4.8 Review

Review on the Degradation Mechanisms of Metal-N-C Catalysts for the Oxygen Reduction Reaction in Acid Electrolyte: Current Understanding and Mitigation Approaches

Related references

Note: Only part of the references are listed.
Article Multidisciplinary Sciences

A non-academic perspective on the future of lithium-based batteries

James T. T. Frith et al.

Summary: This article discusses the significant gap between academic research and industrial market needs in the field of lithium-based batteries, which is partly due to the lack of peer-reviewed publications from industry. The authors present a non-academic perspective to bridge the divide, focusing on key metrics and challenges for developing practical batteries. They emphasize the need to consider various performance aspects together when developing new technologies and also examine the suitability of supply chains, sustainability of materials, and the impact on system-level cost as important factors.

NATURE COMMUNICATIONS (2023)

Article Chemistry, Physical

Fe-N-C Electrocatalyst and Its Electrode: Are We Talking about the Same Material?

Viktoriia A. Saveleva et al.

Summary: This study investigates the structural composition of Fe-N-C materials for the oxygen reduction reaction in proton-exchange membrane fuel cells, before and after catalyst layer preparation, using X-ray absorption and emission spectroscopies. The results reveal the significant impact of the preparation step on the electronic structure and local coordination of Fe, emphasizing the importance of determining the Fe-N-C catalyst structure in the prepared electrode for further studies of the structure-activity-stability correlations.

ACS APPLIED ENERGY MATERIALS (2023)

Article Electrochemistry

Effect of aggregate size and film quality on the electrochemical properties of non-noble metal catalysts in rotating ring disk electrode measurements

Secil Unsal et al.

Summary: Non-noble metal catalysts (NNMCs) have the potential to replace expensive Pt-based catalysts in proton exchange membrane fuel cells (PEMFCs). This study investigated the effect of film thickness and quality on the electrochemical behavior of three NNMCs with different aggregate sizes. The results showed that a smaller particle size enhanced the ORR limiting current and improving thin film quality led to a 2-fold increase in H2O2-yield.

ELECTROCHIMICA ACTA (2023)

Article Chemistry, Physical

Spontaneous aerobic ageing of Fe-N-C materials and consequences on oxygen reduction reaction kinetics

K. Teixeira Santos et al.

Summary: Tremendous progress has been made in improving the oxygen reduction reaction (ORR) activity of iron nitrogen carbon (Fe-N-C) catalysts, which have the potential to replace platinum-group metals in proton exchange membrane fuel cells cathode. However, the degradation mechanisms and practical durability of these catalysts remain major challenges. This study reports on the spontaneous aerobic degradation phenomenon of Fe-N-C materials under atmospheric conditions, which leads to a decrease in their electrocatalytic activity towards the ORR.

JOURNAL OF POWER SOURCES (2023)

Article Chemistry, Multidisciplinary

Decoupling the Contributions of Different Instability Mechanisms to the PEMFC Performance Decay of Non-noble Metal O2-Reduction Catalysts

Secil Unsal et al.

Summary: Non-noble metal catalysts (NNMCs) have the potential to replace expensive Pt-based materials in proton exchange membrane fuel cells (PEMFCs), but their poor durability hinders their commercial implementation. The degradation mechanisms include operative demetallation, electro-oxidation of the carbonaceous matrix, and chemical degradation caused by H2O2 radicals. However, the relative contributions of these mechanisms to overall performance loss are not well understood. In this study, degradation protocols were used to determine that H2O2-related instability is dependent on the ORR charge, while electro-oxidation of the carbon matrix at high potentials is more detrimental to NNMCs' activity than demetallation at low potentials.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2023)

Article Chemistry, Physical

Operando EPR Study of Radical Formation in Anion-Exchange Membrane Fuel Cells

Szymon Wierzbicki et al.

Summary: In this study, the radical formation on selected platinum group metals (PGMs) and PGM-free oxygen-reduction reaction catalysts was measured and identified using spin-trapping and electron-paramagnetic resonance measurements. This work reveals an unexplored radical degradation mechanism in alkaline anion-exchange membrane fuel cells and emphasizes the need for innovative strategies in designing radical attack-resistant membranes.

ACS CATALYSIS (2023)

Article Chemistry, Multidisciplinary

Ultrastable Fe-N-C Fuel Cell Electrocatalysts by Eliminating Non-Coordinating Nitrogen and Regulating Coordination Structures at High Temperatures

Dongsheng Xia et al.

Summary: By conducting high-temperature synthetic chemistry between 1100 and 1200 degrees C, the catalytic and storage stability of Fe-N-C materials have been greatly improved. The optimized catalyst shows excellent stability in proton exchange membrane fuel cells, with over 80% performance retention after 30 hours under H-2/O-2 condition and no activity loss after 35 days of storage, while maintaining competitive oxygen reduction reaction activity and fuel cell performance.

ADVANCED MATERIALS (2023)

Article Chemistry, Physical

Mesoporous textured Fe-N-C electrocatalysts as highly efficient cathodes for proton exchange membrane fuel cells

Srinu Akula et al.

Summary: The new PGM-free PEMFC cathode catalyst materials synthesized using the VariPore (TM) method by Pajarito Powder, LLC show high activity and stability, with mesoporous structure facilitating an effective reaction path.

JOURNAL OF POWER SOURCES (2022)

Article Chemistry, Physical

Time-Resolved Potential-Induced Changes in Fe/N/C-Catalysts Studied by In Situ Modulation Excitation X-Ray Absorption Spectroscopy

Kathrin Ebner et al.

Summary: The development of inexpensive Fe/N/C-materials shows promise for catalyzing the oxygen reduction reaction and reducing CO2, but their application in commercial devices requires improvements in performance and stability; a lack of understanding of the nature of their active sites and catalytic mechanisms currently hinders progress.

ADVANCED ENERGY MATERIALS (2022)

Review Chemistry, Physical

Dual-Metal Atom Electrocatalysts: Theory, Synthesis, Characterization, and Applications

Angus Pedersen et al.

Summary: This review examines the research progress of dual-metal atom catalysts in electrochemistry, including their advantages, current challenges, and future research directions.

ADVANCED ENERGY MATERIALS (2022)

Article Electrochemistry

Selective Electrochemical Production of Hydrogen Peroxide from Reduction of Oxygen on Mesoporous Nitrogen Containing Carbon

Shivangi Mehta et al.

Summary: In this study, mesoporous nitrogen-doped carbon materials were prepared at three different temperatures, and their ability to selectively produce hydrogen peroxide during oxygen reduction reaction in neutral media was tested. The results showed that MNC-600 exhibited high H2O2 selectivity and production rate at 0.7 V vs. RHE.

CHEMELECTROCHEM (2022)

Review Chemistry, Multidisciplinary

Effective Approaches for Designing Stable M-Nx/C Oxygen-Reduction Catalysts for Proton-Exchange-Membrane Fuel Cells

Zhengpei Miao et al.

Summary: This article introduces the theoretical fundamentals, degradation mechanisms, and challenges and prospects of designing stable metal-nitrogen-carbon catalysts.

ADVANCED MATERIALS (2022)

Article Chemistry, Multidisciplinary

Oxygen Reduction Reaction in Alkaline Media Causes Iron Leaching from Fe-N-C Electrocatalysts

Yu-Ping Ku et al.

Summary: This study investigates the dissolution of Fe-N-C electrocatalysts under conditions similar to fuel cells and reveals a linear correlation between the charge passed through the electrode and the amount of Fe dissolved. The findings suggest an interconnection between the oxygen reduction reaction and Fe dissolution, and introduce a simple metric to report the stability of the material.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Review Chemistry, Multidisciplinary

Identification of Catalytic Active Sites for Durable Proton Exchange Membrane Fuel Cell: Catalytic Degradation and Poisoning Perspectives

Syed Shoaib Ahmad Shah et al.

Summary: This article summarizes recent progress in developing active catalysts, from metallic clusters to single-atom active sites (SACs), for electrochemical reactions. Metal coordinated N-doped carbons (M-N-C) show promising performance due to their abundant atomic sites. The article highlights the design and optimization of M-N-x-C-y as active sites for oxygen reduction reaction (ORR), and discusses the improved activity, selectivity, and durability of these relatively new catalysts. Furthermore, the article explores the long-term durability of SACs structures and their relation to catalytic ORR performance, as well as degradation mechanisms and future challenges in the field.

SMALL (2022)

Review Chemistry, Physical

Exploring Durable Single-Atom Catalysts for Proton Exchange Membrane Fuel Cells

Xin Wan et al.

Summary: This review explores the structure-stability relationship of Fe-N-C catalysts, providing valuable guidance for improved stability. Recent achievements include the discovery of several site-specific degradation mechanisms and identification of intrinsically stable active sites, and the discussion of Fe-free single-atom catalysts as an alternative solution.

ACS ENERGY LETTERS (2022)

Article Energy & Fuels

Ta-TiOx nanoparticles as radical scavengers to improve the durability of Fe-N-C oxygen reduction catalysts

Hua Xie et al.

Summary: Researchers have demonstrated that Ta-TiOx nanoparticles can scavenge radicals and improve the durability of Fe-N-C catalysts.

NATURE ENERGY (2022)

Article Chemistry, Physical

Recent advances in integrating platinum group metal-free catalysts in proton exchange membrane fuel cells

Luigi Osmieri et al.

Summary: PGM-free catalysts are promising low-cost materials for oxygen reduction reactions in PEMFCs, with recent performance improvements achieved by tuning catalyst loading, ionomer content, and ink solvent composition. Further explorations of ink processing and MEA fabrication are called for to improve performance.

CURRENT OPINION IN ELECTROCHEMISTRY (2022)

Article Chemistry, Physical

Standardized protocols for evaluating platinum group metal-free oxygen reduction reaction electrocatalysts in polymer electrolyte fuel cells

Hanguang Zhang et al.

Summary: PGM-free electrocatalysts for the oxygen reduction reaction at the fuel cell cathode have shown improved activity, but their stability and durability are still insufficient. This study proposes and validates a test protocol that is relevant to the operating conditions, can be completed within a reasonable time, and widely adopted, to assess the performance and durability of PGM-free catalysts.

NATURE CATALYSIS (2022)

Article Chemistry, Physical

Quantifying the electrochemical active site density of precious metal-free catalysts in situ in fuel cells

Rifael Z. Snitkoff-Sol et al.

Summary: Studying catalyst degradation during fuel cell operation is crucial for addressing durability issues. In this study, a new electrochemical method was reported to accurately quantify the electrochemically active site density of PGM-free catalysts and track their degradation in situ during fuel cell operation.

NATURE CATALYSIS (2022)

Article Chemistry, Physical

High loading of single atomic iron sites in Fe-NC oxygen reduction catalysts for proton exchange membrane fuel cells

Asad Mehmood et al.

Summary: This study demonstrates the achievement of high active site density in non-precious iron-based catalysts by exchanging iron into a preformed carbon-nitrogen matrix, coordinated solely as single-atom Fe-N-4 sites. The catalyst shows excellent performance in proton exchange membrane fuel cells, delivering high current densities and turnover frequency.

NATURE CATALYSIS (2022)

Article Chemistry, Physical

Electrochemical transformation of Fe-N-C catalysts into iron oxides in alkaline medium and its impact on the oxygen reduction reaction activity

Ricardo Sgarbi et al.

Summary: Fe-N-C catalysts show limited stability in acidic medium and may benefit from protective measures. Additionally, a possible synergy between Fe oxide nanoparticles and Fe-NxCy single-atom sites may contribute to higher apparent durability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

Article Energy & Fuels

Atomically dispersed iron sites with a nitrogen-carbon coating as highly active and durable oxygen reduction catalysts for fuel cells

Shengwen Liu et al.

Summary: In this study, a highly durable and active Fe-N-C catalyst was synthesized by depositing a thin layer of nitrogen-doped carbon on the catalyst surface. The stability improvement of the catalyst can overcome the cost barriers of hydrogen fuel cells.

NATURE ENERGY (2022)

Article Chemistry, Multidisciplinary

Identification of the Catalytically Dominant Iron Environment in Iron- and Nitrogen-Doped Carbon Catalysts for the Oxygen Reduction Reaction

Lingmei Ni et al.

Summary: By using Mossbauer spectroscopy and quantum chemistry, researchers have established an active site model for metal-and nitrogen-doped carbon catalysts obtained through pyrolysis. They found that pyrrolic nitrogen coordination is the active site, and identified a previously unknown intermediate.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Review Chemistry, Multidisciplinary

Atomically dispersed dual-metal-site PGM-free electrocatalysts for oxygen reduction reaction: Opportunities and challenges

Xiaoxuan Yang et al.

Summary: This review provides a comprehensive analysis of the advances in developing atomically dispersed dual-metal site catalysts for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells. It explores the structure-property correlation and inherent effects of dual metal sites, and discusses the challenges in rational design, precise synthesis, and high-fidelity structural characterization of dual-metal site catalysts.

SUSMAT (2022)

Article Chemistry, Physical

New insights into degradation of Fe-N-C catalyst layers: ionomer decomposition

Lu Zhou et al.

Summary: Fe-N-C catalysts can replace expensive and scarce platinum-based catalysts in proton exchange membrane fuel cells, and they exhibit better performance stability. The proton resistance increase in MEAs is identified as the primary cause of performance degradation, while changes in the structure and morphology of the cathode catalyst layer are not the main reasons.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

Article Chemistry, Physical

Theoretical insights into dual-atom catalysts for the oxygen reduction reaction: the crucial role of orbital polarization

Wanjuan Zou et al.

Summary: This study systematically investigated 42 types of DACs for the ORR using density functional theory calculations, and found that FeFeNC-4 exhibits the best catalytic activity. The electronic properties of bimetallic sites were further analyzed, and a key descriptor was defined to estimate the catalytic activity of the DAC system.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

Article Chemistry, Multidisciplinary

PGM-Free Oxygen-Reduction Catalyst Development for Proton-Exchange Membrane Fuel Cells: Challenges, Solutions, and Promises

Yanghua He et al.

Summary: In this Account, recent advances in synthesizing efficient PGM-free catalysts for proton-exchange membrane fuel cells (PEMFCs) were highlighted, with an emphasis on effective strategies to improve activity and stability. The formation mechanism of MN4 active sites and their correlation to catalytic properties were discussed, providing guidance for rational catalyst design. The trade-off between activity and stability was identified as a key challenge in developing efficient catalysts for PEMFCs.

ACCOUNTS OF MATERIALS RESEARCH (2022)

Review Chemistry, Multidisciplinary

Catalyst design, measurement guidelines, and device integration for H2O2 electrosynthesis from oxygen reduction

June Sung Lim et al.

Summary: This article presents recent progress in the development of electrocatalysts for the two-electron pathway oxygen reduction reaction (2e(-) ORR), highlighting the importance of active sites, interface structures, and evaluation methods. It also introduces the latest advances in high-current-density H2O2 electrosynthesis reactors and devices.

CELL REPORTS PHYSICAL SCIENCE (2022)

Article Chemistry, Applied

Selective H2O2 production on surface-oxidized metal-nitrogen-carbon electrocatalysts

Minhee Suk et al.

Summary: The electrochemical synthesis of H2O2 is a promising alternative to the anthraquinone redox process, but improving the ORR activity and selectivity remains a challenge. This study demonstrates that partial oxidation of metal-nitrogen-carbon catalysts can enhance H2O2 selectivity by modifying the ORR mechanism.

CATALYSIS TODAY (2021)

Article Electrochemistry

Oxygen reduction reaction mechanism and kinetics on M-NxCyand M@N-C active sites present in model M-N-C catalysts under alkaline and acidic conditions

Ricardo Sgarbi et al.

Summary: This study investigates the performance and stability of Fe-N-C and Co-N-C catalysts in the oxygen reduction reaction (ORR), with atomically dispersed Fe-N(x)C(y) sites showing the highest activity in acidic media and Fe@N-C core-shell sites exhibiting maximum mass activity in alkaline media. The activity of main suspected active sites (M-N(x)C(y)and M@N-C) was discussed based on the known physical-chemical properties of the catalysts, highlighting the role of adequate energy binding and synergistic effects for enhancing catalytic performance.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2021)

Review Chemistry, Multidisciplinary

Low-PGM and PGM-Free Catalysts for Proton Exchange Membrane Fuel Cells: Stability Challenges and Material Solutions

Lei Du et al.

Summary: Fuel cells are gaining popularity as a clean energy technology, but challenges in cost reduction and integration of low-PGM catalysts remain significant barriers to their development.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Fe, Cu-codoped metal-nitrogen-carbon catalysts with high selectivity and stability for the oxygen reduction reaction

Yuemin Wang et al.

Summary: FeCu-based M-N-C catalysts exhibit higher selectivity and stability in the ORR, with lower peroxide yields compared to Fe-N-C. Additionally, FeCu-based M-N-C catalysts show only a 15 mV attenuation in their half-wave potentials after accelerated degradation tests.

CHINESE CHEMICAL LETTERS (2021)

Review Chemistry, Physical

Water management strategies for PGM-free catalyst layers for polymer electrolyte fuel cells

Pongsarun Satjaritanun et al.

Summary: PGM-free catalysts show promise for the oxygen reduction reaction in PEFCs, but thicker catalyst layers may lead to water management issues that need to be addressed to avoid flooding.

CURRENT OPINION IN ELECTROCHEMISTRY (2021)

Article Chemistry, Physical

Fe-N-C Electrocatalysts' Durability: Effects of Single Atoms' Mobility and Clustering

Kavita Kumar et al.

Summary: Second pyrolysis of Fe-N-C catalysts leads to larger mesopore size, higher iron content, and N-pyridinic moieties, resulting in improved ORR activity and selectivity. Aging morphology of catalysts varies significantly depending on whether they underwent a second pyrolysis, with Fe-clusters formation and partial corrosion observed in Fe-HT2 after load cycling aging at 80 degrees C. No clustering was observed at 60 degrees C, suggesting potential guidelines for enhancing stability of Fe-N-C materials.

ACS CATALYSIS (2021)

Article Chemistry, Physical

Identification of durable and non-durable FeNx sites in Fe-N-C materials for proton exchange membrane fuel cells

Jingkun Li et al.

Summary: Fe-N-C materials show promise as an alternative to platinum in acidic polymer fuel cells, but limited understanding of their operando degradation hinders rational approaches to improved durability. Two distinct FeNx sites in the catalysts degrade differently during the oxygen reduction reaction, with one site substantially contributing after 50 hours of operation.

NATURE CATALYSIS (2021)

Article Chemistry, Multidisciplinary

Potential-Induced Spin Changes in Fe/N/C Electrocatalysts Assessed by In Situ X-ray Emission Spectroscopy

Viktoriia A. Saveleva et al.

Summary: This study investigates the electronic structure of molecular sites in two Fe/N/C catalysts by probing their average spin state using X-ray emission spectroscopy (XES), revealing for the first time the existence of reversible, potential-induced spin state changes in these materials.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Electrochemistry

Loading Impact of a PGM-Free Catalyst on the Mass Activity in Proton Exchange Membrane Fuel Cells

Ana Marija Damjanovic et al.

Summary: This study investigated the impact of catalyst loading on the mass activity of PGM-free ORR catalysts, revealing an independence of the ORR mass activity from the catalysts loading when corrections for voltage losses in H-2/O-2 single cell tests are considered. Additionally, no clear relation of stability to the catalyst loading was found in H-2/O-2 PEMFCs.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

Article Electrochemistry

Stability of Atomically Dispersed Fe-N-C ORR Catalyst in Polymer Electrolyte Fuel Cell Environment

R. K. Ahluwalia et al.

Summary: The investigation on a PGM-free Fe-N-C catalyst revealed its durability in AST cycles but instability in H-2/air, with degradation processes associated with the presence of oxygen. The catalyst lost <50% activity after 30,000 AST cycles, but lost similar to 50% activity after 7.5 hours of polarization measurements in H-2/air. The majority of the catalyst activity loss occurred during load cycles in H-2/air rather than AST cycles in H-2/N-2.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2021)

Review Chemistry, Physical

Status and challenges for the application of platinum group metal-free catalysts in proton-exchange membrane fuel cells

Luigi Osmieri et al.

Summary: Significant progress has been made in the development of platinum group metal-free electrocatalysts over the past decade, focusing on synthesis strategies for controlled active site formation and performance gains through electrode engineering. There is also a growing emphasis on durability, understanding degradation mechanisms, and the need for standard performance and accelerated stress test protocols.

CURRENT OPINION IN ELECTROCHEMISTRY (2021)

Review Chemistry, Multidisciplinary

Stabilizing Fe-N-C Catalysts as Model for Oxygen Reduction Reaction

Qianli Ma et al.

Summary: This study investigates the use of Fe-N-C material as a model catalyst for TM-H-C to improve stability, with a systematic summary and discussion on different types of active sites and coordination in Fe-N-C, analysis of potential attenuation mechanisms and strategies, as well as proposed challenges and prospects for the future development of TM-H-C materials for advanced ORR catalysis.

ADVANCED SCIENCE (2021)

Article Chemistry, Physical

Study of the evolution of FeNxCy and Fe3C species in Fe/N/C catalysts during the oxygen reduction reaction in acid and alkaline electrolyte

Alvaro Garcia et al.

Summary: The study found different types of FeNxCy moieties in Fe/C/N catalysts, which evolve during the oxygen reduction reaction (ORR), with pyridinic moieties playing a significant role in the ORR activity.

JOURNAL OF POWER SOURCES (2021)

Article Materials Science, Multidisciplinary

Understanding how single-atom site density drives the performance and durability of PGM-free Fe-N-C cathodes in anion exchange membrane fuel cells

Horie Adabi et al.

Summary: The study demonstrates that the handling of Fe-N-C catalyst precursors can significantly impact the formation of single metal atoms or large particles, leading to drastic differences in catalyst structure, activity, and performance in AEMFCs.

MATERIALS TODAY ADVANCES (2021)

Article Multidisciplinary Sciences

Selective electrochemical reduction of nitric oxide to hydroxylamine by atomically dispersed iron catalyst

Dong Hyun Kim et al.

Summary: The electrocatalytic conversion of nitrogen oxides into high-value chemicals is a promising strategy for mitigating the global nitrogen cycle imbalance. The use of iron-nitrogen-doped carbon as an efficient and durable electrocatalyst for selective reduction of nitric oxide to hydroxylamine is demonstrated in this study.

NATURE COMMUNICATIONS (2021)

Article Nanoscience & Nanotechnology

Efficient Electrochemical Production of H2O2 on Hollow N-Doped Carbon Nanospheres with Abundant Micropores

Yezhou Hu et al.

Summary: The study presented an efficient strategy for onsite H2O2 generation under ambient conditions using hollow N-doped carbon spheres (HNCS) with abundant micropores prepared through a template-directed method. The selectivity of HNCS reached around 91.9% at 0.7 V (vs RHE), and the output for H2O2 production was up to 618.5 mmol g(catalyst)(-1) h(-1) in 0.1 M KOH solution, showing enhanced performance attributed to the hollow structure and heteroatom/defect/pore incorporation. This strategy could guide the design of efficient carbon-based materials for improved 2e(-) ORR.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Physical

Generation Pathway of Hydroxyl Radical in Fe/N/C-Based Oxygen Reduction Electrocatalysts under Acidic Media

Pengyang Zhang et al.

Summary: The main generation pathway of (OH)-O· radical during the acidic ORR was identified as the electrochemical reduction of H2O2 process, but a third unknown pathway appeared above 30 degrees Celsius, which provides a basis for developing radical elimination strategies to stabilize Fe/N/C ORR catalysts or catalyst layers in PEMFCs in the future.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

Article Chemistry, Physical

Chemical vapour deposition of Fe-N-C oxygen reduction catalysts with full utilization of dense Fe-N4 sites

Li Jiao et al.

Summary: Replacing scarce and expensive platinum with metal-nitrogen-carbon (M-N-C) catalysts for the oxygen reduction reaction in proton exchange membrane fuel cells has been impeded by the low active site density and site utilization of M-N-C. These limitations have now been overcome by implementing trans-metalation of Zn-N-4 sites into Fe-N-4 sites.

NATURE MATERIALS (2021)

Article Energy & Fuels

High-performing commercial Fe-N-C cathode electrocatalyst for anion-exchange membrane fuel cells

Horie Adabi et al.

Summary: This study presents a high-performing commercial oxygen reduction catalyst that can replace platinum group metal catalysts, resulting in improved performance and reduced cost for anion-exchange membrane fuel cells.

NATURE ENERGY (2021)

Article Chemistry, Multidisciplinary

Designing highly active nanoporous carbon H2O2 production electrocatalysts through active site identification

June Sung Lim et al.

Summary: The study found that the carboxyl group at the edge sites of graphitic carbons is the primary active site for the 2e ORR, while the carbonyl group is a secondary active site. The nanoporous carbon catalyst with abundant active edge sites and optimized structure exhibited the highest H2O2 electrosynthesis activity and excellent long-term stability.
Review Chemistry, Physical

Advanced Atomically Dispersed Metal-Nitrogen-Carbon Catalysts Toward Cathodic Oxygen Reduction in PEM Fuel Cells

Yijie Deng et al.

Summary: Research shows that atomically dispersed metal-nitrogen-carbon catalysts have significant potential in improving the oxygen reduction reaction and membrane electrode assembly performance of proton exchange membrane fuel cells, indicating promising avenues for addressing current bottlenecks in hydrogen energy conversion.

ADVANCED ENERGY MATERIALS (2021)

Article Chemistry, Multidisciplinary

Quantification of Active Site Density and Turnover Frequency: From Single-Atom Metal to Nanoparticle Electrocatalysts

Geunsu Bae et al.

Summary: This study presents an in situ method for quantifying SD using cyanide as a probe molecule, which allows precise measurement of the decrease in cyanide concentration triggered by adsorption on metal-based active sites. This analytical strategy shows versatile applicability to various SACs and Pt nanoparticles across a broad pH range, providing insights into the structure-activity relationship in electrocatalysts.

JACS AU (2021)

Article Chemistry, Physical

Unveiling the role of carbon oxidation in irreversible degradation of atomically-dispersed FeN4 moieties for proton exchange membrane fuel cells

Xin Tan et al.

Summary: Using density functional theory computations, this study investigated the irreversible degradation mechanism of FeN4 moieties in nonprecious Fe-N-C catalysts at the atomic level, identifying durable and non-durable FeN4 sites.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Physical

Activity and degradation study of an Fe-N-C catalyst for ORR in Direct Methanol Fuel Cell (DMFC)

Ioanna Martinaiou et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2020)

Article Chemistry, Multidisciplinary

Fluorescence detection of hydroxyl radical generated from oxygen reduction on Fe/N/C catalyst

Li-Na Chen et al.

SCIENCE CHINA-CHEMISTRY (2020)

Article Nanoscience & Nanotechnology

High Power Density Platinum Group Metal-free Cathodes for Polymer Electrolyte Fuel Cells

Aman Uddin et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Article Chemistry, Multidisciplinary

Understanding the Activity of Co-N4-xCx in Atomic Metal Catalysts for Oxygen Reduction Catalysis

Qin Yang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Multidisciplinary

Online Monitoring of Electrochemical Carbon Corrosion in Alkaline Electrolytes by Differential Electrochemical Mass Spectrometry

Sandra Moeller et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Multidisciplinary

On the Influence of Oxygen on the Degradation of Fe-N-C Catalysts

Kavita Kumar et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

Article Chemistry, Physical

pH Effect on the H2O2-Induced Deactivation of Fe-N-C Catalysts

Geunsu Bae et al.

ACS CATALYSIS (2020)

Article Chemistry, Analytical

Recent progress in the durability of Fe-N-C oxygen reduction electrocatalysts for polymer electrolyte fuel cells

John Weiss et al.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2020)

Article Chemistry, Physical

Understanding water management in platinum group metal-free electrodes using neutron imaging

Siddharth Komini Babu et al.

JOURNAL OF POWER SOURCES (2020)

Review Chemistry, Physical

Recent advances of Fe-N-C pyrolyzed catalysts for the oxygen reduction reaction

Karina Munoz-Becerra et al.

CURRENT OPINION IN ELECTROCHEMISTRY (2020)

Article Chemistry, Multidisciplinary

Identifying the Active Sites of a Single Atom Catalyst with pH-Universal Oxygen Reduction Reaction Activity

Wenhua Zhong et al.

CELL REPORTS PHYSICAL SCIENCE (2020)

Article Electrochemistry

High Performance FeNC and Mn-oxide/FeNC Layers for AEMFC Cathodes

Pietro Giovanni Santori et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2020)

Review Chemistry, Physical

Iron-Nitrogen-Carbon Catalysts for Proton Exchange Membrane Fuel Cells

Tristan Asset et al.

JOULE (2020)

Article Chemistry, Physical

A Cu and Fe dual-atom nanozyme mimicking cytochrome c oxidase to boost the oxygen reduction reaction

Cheng Du et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

Article Chemistry, Multidisciplinary

Establishing reactivity descriptors for platinum group metal (PGM)-free Fe-N-C catalysts for PEM fuel cells

Mathias Primbs et al.

ENERGY & ENVIRONMENTAL SCIENCE (2020)

Article Chemistry, Physical

Optimization of ionomer-free ultra-low loading Pt catalyst for anode/cathode of PEMFC via magnetron sputtering

Anna Ostroverkh et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2019)

Article Chemistry, Multidisciplinary

Versatile Strategy for Tuning ORR Activity of a Single Fe-N4 Site by Controlling Electron-Withdrawing/Donating Properties of a Carbon Plane

Yeongdong Mun et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Multidisciplinary

Elucidating the Structural Composition of a Fe-N-C Catalyst by Nuclear- and Electron-Resonance Techniques

Stephan Wagner et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

Article Chemistry, Multidisciplinary

Activity-Selectivity Trends in the Electrochemical Production of Hydrogen Peroxide over Single-Site Metal-Nitrogen-Carbon Catalysts

Yanyan Sun et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Physical

Atomically Dispersed Metal Catalysts for Oxygen Reduction

Mengjie Chen et al.

ACS ENERGY LETTERS (2019)

Article Nanoscience & Nanotechnology

Insight into the Rapid Degradation Behavior of Nonprecious Metal Fe-N-C Electrocatalyst-Based Proton Exchange Membrane Fuel Cells

Junren Chen et al.

ACS APPLIED MATERIALS & INTERFACES (2019)

Article Chemistry, Multidisciplinary

Climbing the Apex of the ORR Volcano Plot via Binuclear Site Construction: Electronic and Geometric Engineering

Meiling Xiao et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Physical

Recent Insights into the Oxygen-Reduction Electrocatalysis of Fe/N/C Materials

Wang Wang et al.

ACS CATALYSIS (2019)

Article Chemistry, Multidisciplinary

Integrating PGM-Free Catalysts into Catalyst Layers and Proton Exchange Membrane Fuel Cell Devices

Dustin Bonham et al.

ADVANCED MATERIALS (2019)

Article Chemistry, Multidisciplinary

An Isolated Zinc-Cobalt Atomic Pair for Highly Active and Durable Oxygen Reduction

Ziyang Lu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

Review Chemistry, Multidisciplinary

Progress in the Development of Fe-Based PGM-Free Electrocatalysts for the Oxygen Reduction Reaction

Ulises Martinez et al.

ADVANCED MATERIALS (2019)

Review Chemistry, Multidisciplinary

PGM-Free Cathode Catalysts for PEM Fuel Cells: A Mini-Review on Stability Challenges

Yuyan Shao et al.

ADVANCED MATERIALS (2019)

Review Chemistry, Applied

Fe-N-C catalysts for PEMFC: Progress towards the commercial application under DOE reference

Lina Wang et al.

JOURNAL OF ENERGY CHEMISTRY (2019)

Review Chemistry, Multidisciplinary

The role of hydrogen and fuel cells in the global energy system

Iain Staffell et al.

ENERGY & ENVIRONMENTAL SCIENCE (2019)

Article Chemistry, Multidisciplinary

Nanoparticles of Fe2O3 and Co3O4 as Efficient Electrocatalysts for Oxygen Reduction Reaction in Acid Medium

Ismael C. B. Alves et al.

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY (2019)

Article Chemistry, Physical

Designing the 3D Architecture of PGM-Free Cathodes for H2/Air Proton Exchange Membrane Fuel Cells

Jingkun Li et al.

ACS APPLIED ENERGY MATERIALS (2019)

Article Electrochemistry

Contaminant Cation Effect on Oxygen Transport through the Ionomers of Polymer Electrolyte Membrane Fuel Cells

Jonathan P. Braaten et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2019)

Review Chemistry, Physical

Materials research and development focus areas for low cost automotive proton-exchange membrane fuel cells

Craig S. Gittleman et al.

CURRENT OPINION IN ELECTROCHEMISTRY (2019)

Review Chemistry, Multidisciplinary

Nonprecious Metal Catalysts for Oxygen Reduction in Heterogeneous Aqueous Systems

Andrew A. Gewirth et al.

CHEMICAL REVIEWS (2018)

Review Chemistry, Physical

Review of cell performance in anion exchange membrane fuel cells

Dario R. Dekel

JOURNAL OF POWER SOURCES (2018)

Article Chemistry, Physical

Durability of template-free Fe-N-C foams for electrochemical oxygen reduction in alkaline solution

Albert Mufundirwa et al.

JOURNAL OF POWER SOURCES (2018)

Article Electrochemistry

Carbon Corrosion in PEM Fuel Cells and the Development of Accelerated Stress Tests

Natalia Macauley et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2018)

Article Electrochemistry

Migration of Ce and Mn Ions in PEMFC and Its Impact on PFSA Membrane Degradation

Marta Zaton et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2018)

Article Electrochemistry

Cathode Loading Impact on Voltage Cycling Induced PEMFC Degradation: A Voltage Loss Analysis

Gregor S. Harzer et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2018)

Article Chemistry, Physical

ElectroCat: DOE's approach to PGM-free catalyst and electrode R&D

Simon T. Thompson et al.

SOLID STATE IONICS (2018)

Article Chemistry, Physical

Toward the Decentralized Electrochemical Production of H2O2: A Focus on the Catalysis

Sungeun Yang et al.

ACS CATALYSIS (2018)

Article Multidisciplinary Sciences

A Comprehensive Physical Impedance Model of Polymer Electrolyte Fuel Cell Cathodes in Oxygen-free Atmosphere

Michael Obermaier et al.

SCIENTIFIC REPORTS (2018)

Review Energy & Fuels

Batteries and fuel cells for emerging electric vehicle markets

Zachary P. Cano et al.

NATURE ENERGY (2018)

Article Electrochemistry

Stabilization of Iron-Based Fuel Cell Catalysts by Non-Catalytic Platinum

Anna K. Mechler et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2018)

Article Chemistry, Multidisciplinary

The Achilles' heel of iron-based catalysts during oxygen reduction in an acidic medium

Chang Hyuck Choi et al.

ENERGY & ENVIRONMENTAL SCIENCE (2018)

Review Chemistry, Physical

Durability challenges and perspective in the development of PGM-free electrocatalysts for the oxygen reduction reaction

Ulises Martinez et al.

CURRENT OPINION IN ELECTROCHEMISTRY (2018)

Article Chemistry, Multidisciplinary

Is the rapid initial performance loss of Fe/N/C non precious metal catalysts due to micropore flooding?

Ja-Yeon Choi et al.

ENERGY & ENVIRONMENTAL SCIENCE (2017)

Article Chemistry, Physical

Measurement of protonic resistance of catalyst layers as a tool for degradation monitoring

T. Gaumont et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2017)

Article Chemistry, Multidisciplinary

Design of N-Coordinated Dual-Metal Sites: A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction

Jing Wang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

Article Multidisciplinary Sciences

Identification of catalytic sites in cobalt-nitrogen-carbon materials for the oxygen reduction reaction

Andrea Zitolo et al.

NATURE COMMUNICATIONS (2017)

Article Chemistry, Physical

Mitigation of PFSA membrane chemical degradation using composite cerium oxide-PFSA nanofibres

M. Zaton et al.

JOURNAL OF MATERIALS CHEMISTRY A (2017)

Article Chemistry, Applied

Electrochemical corrosion of a glassy carbon electrode

Youngmi Yi et al.

CATALYSIS TODAY (2017)

Article Chemistry, Multidisciplinary

Unraveling the Nature of Sites Active toward Hydrogen Peroxide Reduction in Fe-N-C Catalysts

Chang Hyuck Choi et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2017)

Review Chemistry, Multidisciplinary

New Insights into Perfluorinated Sulfonic-Acid lonomers

Ahmet Kusoglu et al.

CHEMICAL REVIEWS (2017)

Article Electrochemistry

On the structural composition and stability of Fe-N-C catalysts prepared by an intermediate acid leaching

Ulrike I. Kramm et al.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2016)

Review Chemistry, Multidisciplinary

Importance and Challenges of Electrochemical in Situ Liquid Cell Electron Microscopy for Energy Conversion Research

Nejc Hodnik et al.

ACCOUNTS OF CHEMICAL RESEARCH (2016)

Review Chemistry, Multidisciplinary

Recent Advances in Electrocatalysts for Oxygen Reduction Reaction

Minhua Shao et al.

CHEMICAL REVIEWS (2016)

Article Electrochemistry

Unveiling the crucial role of temperature on the stability of oxygen reduction reaction electrocatalysts

Laetitia Dubau et al.

ELECTROCHEMISTRY COMMUNICATIONS (2016)

Article Chemistry, Multidisciplinary

Structural and mechanistic basis for the high activity of Fe-N-C catalysts toward oxygen reduction

Jingkun Li et al.

ENERGY & ENVIRONMENTAL SCIENCE (2016)

Article Chemistry, Physical

Highly stable precious metal-free cathode catalyst for fuel cell application

Alexey Serov et al.

JOURNAL OF POWER SOURCES (2016)

Article Chemistry, Physical

Tolerance of non-platinum group metals cathodes proton exchange membrane fuel cells to air contaminants

Tatyana Reshetenko et al.

JOURNAL OF POWER SOURCES (2016)

Article Nanoscience & Nanotechnology

Activity targets for nanostructured platinum group-metal-free catalysts in hydroxide exchange membrane fuel cells

Brian P. Setzler et al.

NATURE NANOTECHNOLOGY (2016)

Article Multidisciplinary Sciences

In situ electrochemical quantification of active sites in Fe-N/C non-precious metal catalysts

Daniel Malko et al.

NATURE COMMUNICATIONS (2016)

Article Chemistry, Physical

Minimizing Operando Demetallation of Fe-N-C Electrocatalysts in Acidic Medium

Chang Hyuck Choi et al.

ACS CATALYSIS (2016)

Article Chemistry, Multidisciplinary

High-Performance Direct Methanol Fuel Cells with Precious-Metal-Free Cathode

Qing Li et al.

ADVANCED SCIENCE (2016)

Article Chemistry, Multidisciplinary

Tuning α-Fe2O3 nanotube arrays for the oxygen reduction reaction in alkaline media

Yudong Xue et al.

RSC ADVANCES (2016)

Article Chemistry, Multidisciplinary

Stability of Fe-N-C Catalysts in Acidic Medium Studied by Operando Spectroscopy

Chang Hyuck Choi et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

Article Chemistry, Multidisciplinary

Iron Carbide Nanoparticles Encapsulated in Mesoporous Fe-N-Doped Carbon Nanofibers for Efficient Electrocatalysis

Zhen-Yu Wu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

Review Chemistry, Multidisciplinary

Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction

Yao Nie et al.

CHEMICAL SOCIETY REVIEWS (2015)

Article Electrochemistry

Degradation by Hydrogen Peroxide of Metal-Nitrogen-Carbon Catalysts for Oxygen Reduction

Vincent Goellner et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2015)

Article Multidisciplinary Sciences

Quantifying the density and utilization of active sites in non-precious metal oxygen electroreduction catalysts

Nastaran Ranjbar Sahraie et al.

NATURE COMMUNICATIONS (2015)

Article Chemistry, Physical

Surface-modified single wall carbon nanohorn as an effective electrocatalyst for platinum-free fuel cell cathodes

Sreekuttan M. Unni et al.

JOURNAL OF MATERIALS CHEMISTRY A (2015)

Article Chemistry, Physical

Nano-structured non-platinum catalysts for automotive fuel cell application

Alexey Serov et al.

NANO ENERGY (2015)

Article Chemistry, Physical

Highly Active Non-PGM Catalysts Prepared from Metal Organic Frameworks

Heather M. Barkholtz et al.

CATALYSTS (2015)

Article Chemistry, Multidisciplinary

Hollow Spheres of Iron Carbide Nanoparticles Encased in Graphitic Layers as Oxygen Reduction Catalysts

Yang Hu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2014)

Article Chemistry, Physical

The key role of metal dopants in nitrogen-doped carbon xerogel for oxygen reduction reaction

Sisi Liu et al.

JOURNAL OF POWER SOURCES (2014)

Article Chemistry, Multidisciplinary

Noble-Metal-Free Fe-N/C Catalyst for Highly Efficient Oxygen Reduction Reaction under Both Alkaline and Acidic Conditions

Ling Lin et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2014)

Review Metallurgy & Metallurgical Engineering

REVIEW OF REDUCTIVE LEACHING OF IRON BY ANAEROBIC BACTERIA

T. C. Eisele et al.

MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW (2014)

Article Chemistry, Physical

Degradation of Fe/N/C catalysts upon high polarization in acid medium

Vincent Goellner et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2014)

Review Nanoscience & Nanotechnology

Design criteria for stable Pt/C fuel cell catalysts

Josef C. Meier et al.

BEILSTEIN JOURNAL OF NANOTECHNOLOGY (2014)

Review Energy & Fuels

A review of PEM fuel cell durability: materials degradation, local heterogeneities of aging and possible mitigation strategies

Laetitia Dubau et al.

WILEY INTERDISCIPLINARY REVIEWS-ENERGY AND ENVIRONMENT (2014)

Proceedings Paper Electrochemistry

Development of Pt-free Carbon-Based Catalyst for PEFC Cathode Prepared from Polyacrylonitrile

M. Chokai et al.

POLYMER ELECTROLYTE FUEL CELLS 14 (2014)

Article Chemistry, Multidisciplinary

Iron Encapsulated within Pod-like Carbon Nanotubes for Oxygen Reduction Reaction

Dehui Deng et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2013)

Article Chemistry, Multidisciplinary

Activity Descriptor Identification for Oxygen Reduction on Nonprecious Electrocatalysts: Linking Surface Science to Coordination Chemistry

Nagappan Ramaswamy et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2013)

Article Electrochemistry

Impact of Platinum Loading and Catalyst Layer Structure on PEMFC Performance

Jon P. Owejan et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2013)

Review Microbiology

Antimicrobial activity of metals: mechanisms, molecular targets and applications

Joseph A. Lemire et al.

NATURE REVIEWS MICROBIOLOGY (2013)

Article Multidisciplinary Sciences

Active and stable carbon nanotube/nanoparticle composite electrocatalyst for oxygen reduction

Hoon T. Chung et al.

NATURE COMMUNICATIONS (2013)

Article Chemistry, Multidisciplinary

Stability investigations of electrocatalysts on the nanoscale

Josef C. Meier et al.

ENERGY & ENVIRONMENTAL SCIENCE (2012)

Article Chemistry, Physical

Multitechnique Characterization of a Polyaniline-Iron-Carbon Oxygen Reduction Catalyst

Magali Ferrandon et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2012)

Article Chemistry, Physical

Impact of metal cations on the electrocatalytic properties of Pt/C nanoparticles at multiple phase interfaces

Julien Durst et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2012)

Article Chemistry, Physical

Structure of the catalytic sites in Fe/N/C-catalysts for O-2-reduction in PEM fuel cells

Ulrike I. Kramm et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2012)

Article Chemistry, Multidisciplinary

Platinum supported on CeO2 effectively scavenges free radicals within the electrolyte of an operating fuel cell

Panagiotis Trogadas et al.

CHEMICAL COMMUNICATIONS (2011)

Article Electrochemistry

An EC-FTIR study on the catalytic role of Pt in carbon corrosion

F. Maillard et al.

ELECTROCHEMISTRY COMMUNICATIONS (2011)

Article Chemistry, Multidisciplinary

Recent advances in non-precious metal catalysis for oxygen-reduction reaction in polymer electrolyte fuel cells

Frederic Jaouen et al.

ENERGY & ENVIRONMENTAL SCIENCE (2011)

Article Electrochemistry

Cationic Contamination Effects on Polymer Electrolyte Membrane Fuel Cell Performance

Brian Kienitz et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2011)

Article Multidisciplinary Sciences

Iron-based cathode catalyst with enhanced power density in polymer electrolyte membrane fuel cells

Eric Proietti et al.

NATURE COMMUNICATIONS (2011)

Article Chemistry, Physical

Electrochemistry and the Future of the Automobile

Frederick T. Wagner et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2010)

Article Electrochemistry

Modeling the steady-state effects of cationic contamination on polymer electrolyte membranes

B. L. Kienitz et al.

ELECTROCHIMICA ACTA (2009)

Article Chemistry, Physical

Nitrogen-modified carbon-based catalysts for oxygen reduction reaction in polymer electrolyte membrane fuel cells

Nalini P. Subramanian et al.

JOURNAL OF POWER SOURCES (2009)

Article Chemistry, Physical

Kinetic model of the electrochemical oxidation of graphitic carbon in acidic environments

Kevin G. Gallagher et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2009)

Article Electrochemistry

Degradation mitigation in polymer electrolyte membranes using cerium oxide as a regenerative free-radical scavenger

Panagiotis Trogadas et al.

ELECTROCHEMICAL AND SOLID STATE LETTERS (2008)

Article Electrochemistry

Impact of loading in RRDE experiments on Fe-N-C catalysts: Two- or four-electron oxygen reduction?

Arman Bonakdarpour et al.

ELECTROCHEMICAL AND SOLID STATE LETTERS (2008)

Article Electrochemistry

Fuel cell catalyst degradation on the nanoscale

Karl J. J. Mayrhofer et al.

ELECTROCHEMISTRY COMMUNICATIONS (2008)

Article Electrochemistry

Mathematical modeling of a cation-exchange membrane containing two cations

Charles Delacourt et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2008)

Review Chemistry, Physical

Engineering of nanostructured carbon materials with electron or ion beams

A. V. Krasheninnikov et al.

NATURE MATERIALS (2007)

Article Electrochemistry

Average turn-over frequency of O2 electro-reduction for Fe/N/C and Co/N/C catalysts in PEFCs

Frederic Jaouen et al.

ELECTROCHIMICA ACTA (2007)

Article Chemistry, Physical

Heat-treated Fe/N/C catalysts for O2 electroreduction:: Are active sites hosted in micropores?

F Jaouen et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2006)

Article Electrochemistry

Fe-based catalysts for oxygen reduction in PEMFCs - Importance of the disordered phase of the carbon support

F Jaouen et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2006)

Article Chemistry, Physical

Contaminant absorption and conductivity in polymer electrolyte membranes

MJ Kelly et al.

JOURNAL OF POWER SOURCES (2005)

Review Chemistry, Physical

Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs

HA Gasteiger et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2005)

Article Electrochemistry

A reverse-current decay mechanism for fuel cells

CA Reiser et al.

ELECTROCHEMICAL AND SOLID STATE LETTERS (2005)

Article Electrochemistry

Ex situ and in situ stability studies of PEMFC catalysts

DA Stevens et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2005)

Article Electrochemistry

Electrocatalytic corrosion of carbon support in PEMFC cathodes

LM Roen et al.

ELECTROCHEMICAL AND SOLID STATE LETTERS (2004)

Article Electrochemistry

Characterization of vulcan electrochemically oxidized under simulated PEM fuel cell conditions

KH Kangasniemi et al.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY (2004)

Article Physics, Multidisciplinary

Direct observation of surface chemistry using ultrafast soft-x-ray pulses

M Bauer et al.

PHYSICAL REVIEW LETTERS (2001)