4.8 Review

In Situ X-ray Absorption Spectroscopy of Metal/Nitrogen-doped Carbons in Oxygen Electrocatalysis

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Altering the spin state of Fe-N-C through ligand field modulation of single-atom sites boosts the oxygen reduction reaction

Dongping Xue et al.

Summary: This study demonstrates the electron spin-state modulation of Fe active centers in SA Fe-N-C catalysts, resulting in improved ORR activity. By converting defect-rich pyrrolic N-coordinated FeNx sites, the low-spin state of Fe active centers can be transformed into a high-spin state, enhancing the ORR reaction kinetics significantly. The designed Fe-N4-HS catalyst shows comparable ORR activity to commercial Pt/C catalyst and exhibits higher performances in proton exchange membrane fuel cells and zinc-air batteries.

NANO ENERGY (2023)

Article Chemistry, Multidisciplinary

Atomic Fe-N4/C in Flexible Carbon Fiber Membrane as Binder-Free Air Cathode for Zn-Air Batteries with Stable Cycling over 1000 h

Leping Yang et al.

Summary: In this study, a Fe-N-4/C catalyst immobilized on a carbon fiber membrane was synthesized, showing excellent catalytic activity for oxygen reduction and evolution reactions through sulfur doping to modulate atomic configurations. The catalyst demonstrated superior electrochemical performance and cycling stability, outperforming commercial Pt/C and most reported M-N-x/C catalysts. The findings offer promising prospects for flexible electronic device applications.

ADVANCED MATERIALS (2022)

Article Chemistry, Multidisciplinary

Scalable Molten Salt Synthesis of Platinum Alloys Planted in Metal-Nitrogen-Graphene for Efficient Oxygen Reduction

Shahid Zaman et al.

Summary: The study of a low-platinum nanoalloy-implanted graphene catalyst for fuel cells shows high efficiency and durability, providing important insights for the future development of fuel cell technology.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Chemistry, Multidisciplinary

Engineering Dual Single-Atom Sites on 2D Ultrathin N-doped Carbon Nanosheets Attaining Ultra-Low-Temperature Zinc-Air Battery

Tingting Cui et al.

Summary: The novel dual single-atom catalyst FeMn-DSAC exhibits remarkable bifunctional activities for ORR and OER, enabling efficient operation of the ZAB at ultra-low temperature of -40 degrees C with peak power density of 30 mW cm(-2) and up to 86% specific capacity retention compared to room temperature.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Article Engineering, Environmental

Structural investigation of metallic Ni nanoparticles with N-doped carbon for efficient oxygen evolution reaction

Yucheng Zheng et al.

Summary: This study presents a scalable approach to prepare Ni/NC catalysts with superior activity and durability for OER. By combining ex-situ characterizations and operando X-ray absorption spectroscopy, the surface reconstruction and phase transitions of the catalyst during OER were detailedly investigated, shedding light on the oxidation and reversible transition mechanisms of Ni nanoparticles during the process.

CHEMICAL ENGINEERING JOURNAL (2022)

Review Chemistry, Multidisciplinary

Catalyst overcoating engineering towards high-performance electrocatalysis

Qiang Liu et al.

Summary: This review article highlights the importance of developing advanced heterogeneous catalysts for clean and sustainable energy, focusing on the synthetic methodologies for optimizing electrocatalysts through versatile surface overcoating engineering. Recent progress in this field is discussed, along with the correlation between catalyst intrinsic structures and electrocatalytic properties. The opportunities and perspectives of surface overcoating engineering for designing advanced catalysts and their broad applications are presented.

CHEMICAL SOCIETY REVIEWS (2022)

Review Chemistry, Multidisciplinary

In Situ/Operando Insights into the Stability and Degradation Mechanisms of Heterogeneous Electrocatalysts

Lindong Liu et al.

Summary: The further commercialization of renewable energy conversion and storage technologies requires durable heterogeneous electrocatalysts, and studying the stability and degradation mechanisms of these electrocatalysts is crucial for breakthroughs in stability issues. In situ/operando techniques performed under realistic reaction conditions are urgently needed to understand the nature of active center structures and establish links between structural motifs in a catalyst and its stability properties.

SMALL (2022)

Article Chemistry, Physical

Relation between Water Oxidation Activity and Coordination Environment of C,N-Coordinated Mononuclear Co Catalyst

Qing'e Huang et al.

Summary: By studying the water oxidation catalysis of mononuclear Co catalysts with different structures incorporated into a graphene matrix, it was found that the CoCN3Cl structure exhibited the best performance due to the increased binding strength between the Co site and reaction intermediates. This work demonstrates the importance of the coordination environment of the metal nucleus in catalysts for manipulating the rate-determining step and optimizing activity in the oxygen evolution reaction.

ACS CATALYSIS (2022)

Article Chemistry, Physical

Single-Atom and Bimetallic Nanoalloy Supported on Nanotubes as a Bifunctional Electrocatalyst for Ultrahigh-Current-Density Overall Water Splitting

Wenhui Luo et al.

Summary: This work presents the rational design and fabrication of a highly efficient, cost-effective, and environmentally friendly non-noble-metal bifunctional catalyst for electrocatalytic overall water splitting. The catalyst exhibits excellent catalytic performance, achieving high current density at low cell voltage, and can be reactivated after simple treatment.

ACS CATALYSIS (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, Multidisciplinary

Insight into Structural Evolution, Active Sites, and Stability of Heterogeneous Electrocatalysts

Shenlong Zhao et al.

Summary: Studying the structure-activity correlations of electrocatalysts is crucial for improving the conversion of electrical to chemical energy. Recent evidence obtained through operando characterization techniques shows that the structural evolution of catalysts, caused by their interaction with electric fields, electrolytes, and reactants/intermediates, leads to the formation of real active sites. It is therefore important to summarize the research advances in structural evolution and envision future developments. In this Minireview, the fundamental concepts associated with structural evolution, the triggers of this evolution, and advanced operando characterizations are discussed. The reversibility of structural evolution in heterogeneous electrocatalysis, with a focus on the oxygen evolution and CO2 reduction reactions, is also highlighted. Finally, the key challenges and opportunities in this exciting field are presented.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Review Chemistry, Multidisciplinary

Nitrogen-Rich Carbonaceous Materials for Advanced Oxygen Electrocatalysis: Synthesis, Characterization, and Activity of Nitrogen Sites

Bin Wu et al.

Summary: Nitrogen-doped carbons are a rapidly growing class of materials for oxygen electrocatalysis, offering low cost, environmental friendliness, excellent conductivity, and scalable synthesis. They have the potential to replace precious metal-based electrocatalysts and reduce costs in energy conversion and storage systems.

ADVANCED FUNCTIONAL MATERIALS (2022)

Article Chemistry, Multidisciplinary

Construction of N, P Co-Doped Carbon Frames Anchored with Fe Single Atoms and Fe2P Nanoparticles as a Robust Coupling Catalyst for Electrocatalytic Oxygen Reduction

Yuan Pan et al.

Summary: A coupling catalyst with highly dispersed N, P co-doped carbon frames anchored with Fe single atoms and Fe2P nanoparticles has been synthesized for the electrocatalytic oxygen reduction reaction. The optimized catalyst shows superior activity and stability in acidic and alkaline media, and theoretical calculations reveal a synergistic effect of Fe2P and doped P atoms. The study provides a novel idea for constructing high-efficiency ORR electrocatalysts with atomic-level precision.

ADVANCED MATERIALS (2022)

Article Chemistry, Multidisciplinary

Operando Resonant Soft X-ray Scattering Studies of Chemical Environment and Interparticle Dynamics of Cu Nanocatalysts forCO2Electroreduction

Yao Yang et al.

Summary: Understanding the chemical environment and interparticle dynamics of nanoparticle electrocatalysts is crucial for controlling their activity and selectivity. In this study, the EC-RSoXS method was used to investigate the structural transformation and chemical identity of active sites in Cu nanoparticle ensembles. The results revealed different behaviors of nanoparticles of different sizes under X-ray exposure.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

Article Chemistry, Physical

Single-atom Fe-N5 catalyst for high-performance zinc-air batteries

Le Li et al.

Summary: A single-atom catalyst Fe-N-C/rGO SAC is prepared by pyrolyzing ZIF-8 and GO composite, which effectively promotes the oxygen reduction and oxygen evolution reactions for both liquid and solid-state ZABs, exhibiting excellent performance and reliable cycling stability.

NANO RESEARCH (2022)

Article Chemistry, Physical

Efficient oxygen electrocatalysts with highly-exposed Co-N4 active sites on N-doped graphene-like hierarchically porous carbon nanosheets enhancing the performance of rechargeable Zn-air batteries

Nengfei Yu et al.

Summary: This article reports a novel, efficient and low-cost bifunctional oxygen electrocatalyst, which is prepared by anchoring atomically dispersed cobalt atoms on nitrogen-doped porous graphene nanosheets and forming a unique Co-N-4-C structure. The catalyst exhibits excellent electrical conductivity, large surface area and three-dimensional hierarchically porous architecture, providing more active sites to accelerate the kinetics of oxygen reduction reaction and oxygen evolution reaction, as well as facilitating charge transport to reduce diffusion barrier. The catalyst demonstrates superior bifunctional activity and durability compared to noble-metal catalysts, showing promise for energy conversion and storage applications.

NANO RESEARCH (2022)

Article Chemistry, Physical

Rationalization on high-loading iron and cobalt dual metal single atoms and mechanistic insight into the oxygen reduction reaction

Min Jiang et al.

Summary: This study presents an effective plasma engineering strategy for constructing Fe/Co dual single atoms with high loading on nitrogen-doped carbon nanofibers, which exhibit superior performance in oxygen reduction reactions. The N-3-Fe-Co-N-3 moieties are identified as the main active sites, with in situ XAS and Raman spectroscopy revealing structural changes during the reaction. The high loading of single atoms and enhanced activity make the catalyst promising for practical applications in Al-air batteries and PEMFCs.

NANO ENERGY (2022)

Article Chemistry, Physical

One-Step Facile Synthesis of High-Activity Nitrogen-Doped PtNiN Oxygen Reduction Catalyst

Liang Song et al.

Summary: A facile one-step synthesis method was developed to prepare PtNiN/C catalyst with high ORR performance and stability. Superior performance was demonstrated in electrochemical testing and fuel cell experiments, supported by in situ X-ray absorption spectroscopy confirming the formation of Pt monolayer shells on nitrided cores.

ACS APPLIED ENERGY MATERIALS (2022)

Article Chemistry, Multidisciplinary

Synergetic Dual-Ion Centers Boosting Metal Organic Framework Alloy Catalysts toward Efficient Two Electron Oxygen Reduction

Meihuan Liu et al.

Summary: A strategy utilizing synergetic dual-metal-ion centers to improve the efficiency of hydrogen peroxide generation through transition-metal-based metal organic framework (MOF) alloy nanomaterials as oxygen reduction reaction (ORR) electrocatalysts is proposed. The MOF alloys with unique Ni-M (M-Co, Cu, Zn) synergetic centers synthesized through a facile wet chemical method effectively inhibit O-2 cleavage and demonstrate excellent H2O2 selectivity, activity, and stability.

SMALL (2022)

Article Chemistry, Multidisciplinary

Transition Metal (Co, Ni, Fe, Cu) Single-Atom Catalysts Anchored on 3D Nitrogen-Doped Porous Carbon Nanosheets as Efficient Oxygen Reduction Electrocatalysts for Zn-Air Battery

Mengtian Zhang et al.

Summary: In this study, highly active single-atom catalysts (SACs) for oxygen reduction reaction (ORR) were explored using density functional theory (DFT) calculations and experimental synthesis. Co SACs showed the best ORR activity, comparable to platinum catalysts. X-ray absorption fine structure (XAFS) spectra confirmed that atomically dispersed Co-N-4 sites were the active sites. Additionally, the catalyst exhibited outstanding performance in a zinc-air battery.

SMALL (2022)

Review Chemistry, Multidisciplinary

Uncovering the Nature of Active Sites during Electrocatalytic Reactions by In Situ Synchrotron-Based Spectroscopic Techniques

Tao Yao et al.

Summary: This article emphasizes the substantial achievements in cutting-edge in situ X-ray spectroscopy techniques, presenting representative carbon-neutral electrocatalytic examples to showcase the principles and virtues of identifying active sites and tracing intermediate species. In the water splitting reaction, interactions between active sites and support, as well as the adsorption behaviors of intermediates, are considered important factors governing performance. Additionally, the structural rearrangement of alloy catalysts driven by cathodic potential significantly influences the activity and selectivity towards ECR.

ACCOUNTS OF CHEMICAL RESEARCH (2022)

Review Chemistry, Multidisciplinary

What X-Ray Absorption Spectroscopy Can Tell Us About the Active State of Earth-Abundant Electrocatalysts for the Oxygen Evolution Reaction

Marcel Risch et al.

Summary: The rational improvement of electrocatalyst materials is crucial for implementing chemical energy storage for a sustainable energy supply. The combination of electrochemical methods and X-ray absorption spectroscopy can provide insights into the nature of these materials under reaction conditions. In this article, the authors introduce the concepts of electrochemistry and X-ray absorption spectroscopy, discuss the changes that electrocatalytic materials undergo, and provide examples using Mn oxides. They also highlight the current state of combining these methods to elucidate active states and discuss potential opportunities for understanding electrocatalysis mechanisms.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

Review Chemistry, Multidisciplinary

Recent Development of Nickel-Based Electrocatalysts for Urea Electrolysis in Alkaline Solution

Krishnan Shanmugam Anuratha et al.

Summary: Urea electrolysis is considered as a promising pathway for sustainable hydrogen fuel production, which can contribute to the development of a low-carbon future. This review discusses the basics and fundamentals of urea electrolysis, as well as strategies for designing electrocatalysts. It summarizes the catalytic performance, mechanisms, and factors affecting the activity of various nickel-based electrocatalysts for urea electrolysis. The challenges, prospects, and expectations of bifunctional electrocatalysts for urea-based energy conversion technologies are also highlighted.

NANOMATERIALS (2022)

Article Chemistry, Physical

The role of Cu1-O3 species in single-atom Cu/ZrO2 catalyst for CO2 hydrogenation

Huibo Zhao et al.

Summary: This study reports a novel copper-based catalyst with isolated active copper sites for the hydrogenation of CO2 to methanol. The Cu-1-O-3 units in the Cu-Zr catalyst are found to contribute solely to methanol synthesis, while small copper clusters or nanoparticles with Cu-Cu structural patterns are responsible for the formation of CO by-product. Additionally, the migration of Cu-1-O-3 units to the catalyst surface during the catalytic process accelerates CO2 hydrogenation. These findings extend the application potential of single-atom catalysts for thermal catalytic CO2 hydrogenation and provide insights for the design of high-performance copper-based catalysts to meet industrial demand.

NATURE CATALYSIS (2022)

Review Chemistry, Multidisciplinary

In situ/operando analysis of surface reconstruction of transition metal-based oxygen evolution electrocatalysts

Shengmei Chen et al.

Summary: This article reviews the progress in surface reconstruction and active species identification of transition metal-based electrocatalysts, and highlights the importance of in situ/operando techniques in revealing catalytic mechanisms and identifying new active species.

CELL REPORTS PHYSICAL SCIENCE (2022)

Review Chemistry, Multidisciplinary

In Situ/Operando Electrocatalyst Characterization by X-ray Absorption Spectroscopy

Janis Timoshenko et al.

Summary: X-ray absorption spectroscopy (XAS) is a crucial method for investigating the structure and composition of heterogeneous catalysts, revealing the nature of active sites and establishing links between structural motifs, local electronic structure, and catalytic properties. Recent advancements in instrumentation and data analysis approaches for deciphering X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra have been discussed, with emphasis on applications in the field of heterogeneous catalysis, particularly in electrocatalysis.

CHEMICAL REVIEWS (2021)

Article Nanoscience & Nanotechnology

Ni Nanoparticles on Ni Core/N-Doped Carbon Shell Heterostructures for Electrocatalytic Oxygen Evolution

Sujin Seok et al.

Summary: In this study, a Ni-based core-shell material (Ni@Ni-NC) was produced through heat treatment, demonstrating excellent electrocatalytic OER performance with over- and onset potentials better than commercial IrO2. The well-dispersed Ni-NC species and core-shell structures play key roles in improving the electrocatalytic OER performance. Density functional theory (DFT) calculations indicate a dual-site OER mechanism with low reaction barrier for the Ni-NC active species.

ACS APPLIED NANO MATERIALS (2021)

Article Chemistry, Multidisciplinary

Metal-Triazolate-Framework-Derived FeN4Cl1 Single-Atom Catalysts with Hierarchical Porosity for the Oxygen Reduction Reaction

Linyu Hu et al.

Summary: Utilizing metal-organic frameworks (MOFs) as precursors, single-atom catalysts with high density have been successfully constructed. FeN4Cl1/NC demonstrates excellent oxygen reduction reaction (ORR) activity, with Cl optimizing the adsorption free energy of Fe sites to promote the ORR process.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Dynamically Unveiling Metal-Nitrogen Coordination during Thermal Activation to Design High-Efficient Atomically Dispersed CoN4 Active Sites

Yanghua He et al.

Summary: The structural evolution of CoN4 sites during thermal activation was studied using a ZIF-8-derived carbon host. It was found that the critical transition occurs at 700 degrees C with optimal conversion at 900 degrees C, resulting in the highest intrinsic activity and four-electron selectivity for the ORR.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Review Energy & Fuels

M-N-C-based single-atom catalysts for H2, O2 & CO2 electrocatalysis: activity descriptors, active sites identification, challenges and prospects

Anuj Kumar et al.

Summary: This review highlights the application of single-atom catalysts in electrocatalytic activation of small molecules, focusing on activity descriptors, recent advancements, characterization techniques, design methods, challenges, and future prospects for metal-nitrogen-carbon based SACs.
Review Chemistry, Physical

Approaches to achieve surface sensitivity in the in situ XAS of electrocatalysts

Haoliang Huang et al.

Summary: To fully understand the detailed mechanism of electrocatalytic reactions on high surface areas/nanoparticle electrocatalysts, in situ XAS studies have been conducted on single-atom, metal, and metal oxide electrocatalysts, highlighting the approaches taken to achieve surface sensitivity by careful designing of the sample under investigation.

CURRENT OPINION IN ELECTROCHEMISTRY (2021)

Article Chemistry, Multidisciplinary

Unveiling the Nature of Pt Single-Atom Catalyst during Electrocatalytic Hydrogen Evolution and Oxygen Reduction Reactions

Junjie Li et al.

Summary: This study achieves high loading of Pt single atoms on carbon nanosheets through atomic layer deposition and investigates the activity of Pt single atoms and nanoparticles using operando X-ray absorption spectroscopy in the hydrogen evolution reaction and oxygen reduction reaction. The results reveal differences in the unoccupied density of states of Pt 5d orbitals between Pt single atoms and nanoparticles, as well as the formation of a stable Pt oxide during ORR on the Pt-1/NCNS catalyst.

SMALL (2021)

Article Chemistry, Physical

Regulated coordination environment of Ni single atom catalyst toward high-efficiency oxygen electrocatalysis for rechargeable Zinc-air batteries

Fang Luo et al.

Summary: A secondary single-atom regulation strategy was developed to optimize the coordination environment of single atom Ni catalysts by introducing atomically dispersed Fe moieties, resulting in highly efficient oxygen electrocatalysis. The Fe, Ni dual atom catalyst showed superior performance in oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and rechargeable zinc-air batteries, indicating its potential for practical applications in energy storage devices.

ENERGY STORAGE MATERIALS (2021)

Article Chemistry, Multidisciplinary

Understanding of Neighboring Fe-N4-C and Co-N4-C Dual Active Centers for Oxygen Reduction Reaction

Huanxin Li et al.

Summary: The study reports FeCo-N-doped hollow carbon nanocages as efficient catalysts with neighboring Fe-N-4-C and Co-N-4-C dual active centers, showing better catalytic activity than Fe single-metal catalyst for oxygen reduction reaction. This highlights the important role of synergy between dual active centers in reducing the reaction energy barriers for ORR.

ADVANCED FUNCTIONAL MATERIALS (2021)

Article Chemistry, Multidisciplinary

Recent Progress in Advanced Electrocatalyst Design for Acidic Oxygen Evolution Reaction

Leigang Li et al.

Summary: This Progress Report summarizes recent research progress in advanced electrocatalysts for improved acidic OER performance. It discusses fundamental understanding about acidic OER including reaction mechanisms and atomic understanding for rational design of efficient electrocatalysts. It also provides an overview of the progress in the design and synthesis of advanced acidic OER electrocatalysts in terms of catalyst category.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Operando Cooperated Catalytic Mechanism of Atomically Dispersed Cu-N4 and Zn-N4 for Promoting Oxygen Reduction Reaction

Miaomiao Tong et al.

Summary: The dual-metal single-atom catalyst Cu/Zn-NC shows excellent ORR activity and stability, with operando XANES and DFT calculations revealing the synergistic interaction between Cu-N-4 and Zn-N-4 as well as the transitions between different states.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Multidisciplinary Sciences

Low coordination number copper catalysts for electrochemical CO2 methanation in a membrane electrode assembly

Yi Xu et al.

Summary: In this study, the authors investigate the electrochemical conversion of carbon dioxide to methane and develop a moderator strategy to maintain the catalyst in a low coordination state, enabling stable and selective electrochemical methanation.

NATURE COMMUNICATIONS (2021)

Article Chemistry, Multidisciplinary

Hierarchically Assembled Cobalt Oxynitride Nanorods and N-Doped Carbon Nanofibers for Efficient Bifunctional Oxygen Electrocatalysis with Exceptional Regenerative Efficiency

Ki Ro Yoon et al.

Summary: Optimized design of bifunctional oxygen electrocatalysts is crucial for achieving high-performance energy conversion systems. The novel CoOx@CoNy/NCNF hybrid catalyst exhibits excellent oxygen reduction and oxygen evolution reaction activity, catalyzing redox reactions effectively and enhancing the stability of Zn-air batteries.

ACS NANO (2021)

Article Chemistry, Multidisciplinary

Sodium-Decorated Amorphous/Crystalline RuO2 with Rich Oxygen Vacancies: A Robust pH-Universal Oxygen Evolution Electrocatalyst

Lijie Zhang et al.

Summary: The study developed sodium-decorated amorphous/crystalline RuO2 with rich oxygen vacancies as a pH-universal OER electrocatalyst, showing remarkable acid resistance and high catalytic stability. The introduction of Na dopant and oxygen vacancy in RuO2 was found to lower the energy barrier for OER by weakening the adsorption strength of the OER intermediates.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Dynamic Behavior of Single-Atom Catalysts in Electrocatalysis: Identification of Cu-N-3 as an Active Site for the Oxygen Reduction Reaction

Ji Yang et al.

Summary: Atomically dispersed Cu-N-C single-atom catalysts with Cu2+-N-4 structure exhibit comparable activity and superior durability to Pt/C in the electrochemical reduction of oxygen. The dynamic evolution of Cu-N-4 to Cu-N-3 and further to HO-Cu-N-2 under ORR conditions is identified, with the low-coordinated Cu+-N-3 being determined as the real active site. The findings may guide the design of more efficient low-cost catalysts.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

Article Chemistry, Physical

Chemical Vapor Deposition for N/S-Doped Single Fe Site Catalysts for the Oxygen Reduction in Direct Methanol Fuel Cells

Xiaohang Li et al.

Summary: A nitrogen/sulfur codoped single iron site catalyst (Fe-N/S-C) prepared through chemical vapor deposition (CVD) showed superior catalytic activity for the oxygen reduction reaction (ORR) in alkaline media. The tuning of optimal charge distribution of Fe sites by N and S codoping and the suppression of iron-carbide-containing iron clusters formation contributed to the high performance of the catalyst. Further studies demonstrated its promising performance as a cathode catalyst in direct methanol fuel cells.

ACS CATALYSIS (2021)

Article Chemistry, Applied

Single-atom catalysts for electrochemical energy storage and conversion

Wei Ma et al.

Summary: This review summarizes recent strategies for synthesizing single-atom catalysts (SACs), their functions, applications, challenges, and future perspectives.

JOURNAL OF ENERGY CHEMISTRY (2021)

Article Chemistry, Multidisciplinary

High Durability of a 14-Membered Hexaaza Macrocyclic Fe Complex for an Acidic Oxygen Reduction Reaction Revealed by In Situ XAS Analysis

Junya Ohyama et al.

Summary: In this study, the durability of the Fe-14MR complex was compared to that of Fe phthalocyanine (FePc) using in situ X-ray absorption spectroscopy; demetalation of the Fe complexes was directly observed during electrochemical experiments performed under acidic ORR conditions. It was found that Fe-14MR is significantly more resistant to demetalation than FePc during the ORR.

JACS AU (2021)

Review Chemistry, Physical

Transition metal/carbon hybrids for oxygen electrocatalysis in rechargeable zinc-air batteries

Abdoulkader Ibro Douka et al.

Summary: Transition metal/carbon hybrid catalysts have shown great potential in oxygen electrocatalysis, divided into two categories of integrated metal/metal oxides nanoparticles and atomically dispersed transition metal/carbon matrix. The research focuses on the relationship between structure and performance, as well as their synthesis strategies, and comprehensively discusses their application in rechargeable ZABs.

ECOMAT (2021)

Article Chemistry, Multidisciplinary

Experimental Considerations for Operando Metal-Ion Battery Monitoring using X-ray Techniques

D. Saurel et al.

Summary: Careful control of experimental parameters is crucial in obtaining high-quality data from operando measurements, including cell configuration, nature of cell components, electrode preparation approach, optical/goniometer geometry, data acquisition protocols, and data interpretation methodology.

CHEMISTRYMETHODS (2021)

Article Chemistry, Multidisciplinary

In-situ X-ray techniques for non-noble electrocatalysts

Sung-Fu Hung

PURE AND APPLIED CHEMISTRY (2020)

Review Chemistry, Multidisciplinary

Oxygen K-edge X-ray Absorption Spectra

Federica Frati et al.

CHEMICAL REVIEWS (2020)

Review Chemistry, Multidisciplinary

Operando X-Ray Spectroscopic Techniques: A Focus on Hydrogen and Oxygen Evolution Reactions

M. V. Varsha et al.

FRONTIERS IN CHEMISTRY (2020)

Article Chemistry, Physical

Characterizing Complex Gas-Solid Interfaces with in Situ Spectroscopy: Oxygen Adsorption Behavior on Fe-N-C Catalysts

Michael J. Dzara et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2020)

Article Chemistry, Multidisciplinary

Dynamic Evolution of Solid-Liquid Electrochemical Interfaces over Single-Atom Active Sites

Hui Su et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

Article Multidisciplinary Sciences

Engineering unsymmetrically coordinated Cu-S1N3 single atom sites with enhanced oxygen reduction activity

Huishan Shang et al.

NATURE COMMUNICATIONS (2020)

Article Multidisciplinary Sciences

Key activity descriptors of nickel-iron oxygen evolution electrocatalysts in the presence of alkali metal cations

Mikaela Goerlin et al.

NATURE COMMUNICATIONS (2020)

Article Chemistry, Physical

MOF-derived Fe,Co@N-C bifunctional oxygen electrocatalysts for Zn-air batteries

Xinde Duan et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

Article Materials Science, Multidisciplinary

High-Density Planar-like Fe2N6 Structure Catalyzes Efficient Oxygen Reduction

Nan Zhang et al.

MATTER (2020)

Article Chemistry, Multidisciplinary

High-purity pyrrole-type FeN4 sites as a superior oxygen reduction electrocatalyst

Nan Zhang et al.

ENERGY & ENVIRONMENTAL SCIENCE (2020)

Article Chemistry, Multidisciplinary

Co Nanoislands Rooted on Co-N-C Nanosheets as Efficient Oxygen Electrocatalyst for Zn-Air Batteries

Peng Yu et al.

ADVANCED MATERIALS (2019)

Review Nanoscience & Nanotechnology

In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts

Maoyu Wang et al.

NANO-MICRO LETTERS (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)

Article Chemistry, Multidisciplinary

In Situ X-ray Absorption Spectroscopy of a Synergistic Co-Mn Oxide Catalyst for the Oxygen Reduction Reaction

Yao Yang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Multidisciplinary

Tuning the Coordination Environment in Single-Atom Catalysts to Achieve Highly Efficient Oxygen Reduction Reactions

Jinqiang Zhang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Review Chemistry, Multidisciplinary

Robust noble metal-based electrocatalysts for oxygen evolution reaction

Qiurong Shi et al.

CHEMICAL SOCIETY REVIEWS (2019)

Review Chemistry, Physical

Understanding heterogeneous electrocatalytic carbon dioxide reduction through operando techniques

Albertus D. Handoko et al.

NATURE CATALYSIS (2018)

Article Chemistry, Physical

Fe incorporated α-Co(OH)2 nanosheets with remarkably improved activity towards the oxygen evolution reaction

Haiyan Jin et al.

JOURNAL OF MATERIALS CHEMISTRY A (2017)

Review Chemistry, Multidisciplinary

Soft X-ray Absorption Spectroscopy of Liquids and Solutions

Jacob W. Smith et al.

CHEMICAL REVIEWS (2017)

Review Chemistry, Physical

Operando X-ray absorption spectroscopy: A powerful tool toward water splitting catalyst development

Emiliana Fabbri et al.

CURRENT OPINION IN ELECTROCHEMISTRY (2017)

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, Multidisciplinary

A General Approach to Preferential Formation of Active Fe-Nx Sites in Fe-N/C Electrocatalysts for Efficient Oxygen Reduction Reaction

Young Jin Sa et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2016)

Article Energy & Fuels

A metal-organic framework-derived bifunctional oxygen electrocatalyst

Bao Yu Xia et al.

NATURE ENERGY (2016)

Article Chemistry, Physical

A first-principle calculation of the XANES spectrum of Cu2+ in water

G. La Penna et al.

JOURNAL OF CHEMICAL PHYSICS (2015)

Review Chemistry, Multidisciplinary

Oxygen electrocatalysts in metal-air batteries: from aqueous to nonaqueous electrolytes

Zhong-Li Wang et al.

CHEMICAL SOCIETY REVIEWS (2014)

Review Geochemistry & Geophysics

Fundamentals of XAFS

Matthew Newville

SPECTROSCOPIC METHODS IN MINERALOLOGY AND MATERIALS SCIENCES (2014)

Article Chemistry, Multidisciplinary

In Situ Electrochemical X-ray Absorption Spectroscopy of Oxygen Reduction Electrocatalysis with High Oxygen Flux

Evan M. Erickson et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2012)

Article Chemistry, Multidisciplinary

Fe/N/C Composite in Li-O2 Battery: Studies of Catalytic Structure and Activity toward Oxygen Evolution Reaction

Jiang-Lan Shui et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2012)

Article Materials Science, Multidisciplinary

Bulk sensitive x-ray absorption spectroscopy free of self-absorption effects

A. J. Achkar et al.

PHYSICAL REVIEW B (2011)

Article Chemistry, Physical

Magnetic memory of a single-molecule quantum magnet wired to a gold surface

Matteo Mannini et al.

NATURE MATERIALS (2009)

Article Spectroscopy

Design of an electrochemical cell for in situ XAS studies

N. Watanabe et al.

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA (2007)

Review Multidisciplinary Sciences

The problem with determining atomic structure at the nanoscale

Simon J. L. Billinge et al.

SCIENCE (2007)

Article Instruments & Instrumentation

An in situ cell for characterization of solids by soft x-ray absorption

IJ Drake et al.

REVIEW OF SCIENTIFIC INSTRUMENTS (2004)

Article Chemistry, Physical

The probing depth of total electron yield in the sub-keV range: TEY-XAS and X-PEEM

BH Frazer et al.

SURFACE SCIENCE (2003)