Achieving efficient oxygen reduction on ultra-low metal-loaded electrocatalysts by constructing well-dispersed bimetallic sites and interconnected porous channels

Article Chemistry, Multidisciplinary

Coupling the Atomically Dispersed Fe-N3 Sites with Sub-5 nm Pd Nanocrystals Confined in N-Doped Carbon Nanobelts to Boost the Oxygen Reduction for Microbial Fuel Cells

Zinan Lin et al.

Summary: This study combines Fe and Pd together through a designed pyrolysis mechanism, forming FeN3-Pd@NC NBs, which exhibit outstanding activity and durability in the oxygen reduction reaction.

ADVANCED FUNCTIONAL MATERIALS (2022)

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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)

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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)

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Article Chemistry, Physical

Atomically Dispersed Fe-Co Dual Metal Sites as Bifunctional Oxygen Electrocatalysts for Rechargeable and Flexible Zn-Air Batteries

Yuting He et al.

Summary: This study presents atomically dispersed Fe-Co dual metal sites derived from Fe and Co codoped zeolitic imidazolate frameworks, showing excellent bifunctional catalytic activity for ORR and OER in alkaline media. The FeCo-NC catalyst exhibits outstanding stability and is integrated into an air electrode for fabricating rechargeable and flexible Zn-air batteries, achieving a high power density and long-cycle stability. This work offers a method to design and synthesize atomically dispersed multi-metal site catalysts for advanced electrocatalysis.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Understanding the Crucial Significance of the Temperature and Potential Window on the Stability of Carbon Supported Pt-Alloy Nanoparticles as Oxygen Reduction Reaction Electrocatalysts

Tina Dukic et al.

Summary: This research provides a study on the stability of carbon-supported intermetallic Pt-alloy electrocatalysts and determines the effects of temperature and potential window on metal dissolution. The findings contradict the commonly accepted hypothesis that Pt dissolution is not significantly affected by temperature, and highlight the critical role of temperature in governing Pt stability and metal retention in Pt-alloy electrocatalysts. Additionally, the study shows that the rate of Pt redeposition increases with temperature, providing insight into the temperature-dependent kinetics of Pt stability.

ACS CATALYSIS (2022)

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Article Chemistry, Multidisciplinary

Modulating the Electronic Structure of FeCo Nanoparticles in N-Doped Mesoporous Carbon for Efficient Oxygen Reduction Reaction

Guihua Zhu et al.

Summary: This study reports an excellent oxygen reduction electrocatalyst FeCo/NC, which exhibits promising electrocatalytic activity and superior durability due to the highly exposed bimetal active sites and carefully designed structure. The research provides valuable insights into the structure-performance relationship of nonprecious metals and transition metal-based alloy catalysts.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Atomically dispersed Pt and Fe sites and Pt-Fe nanoparticles for durable proton exchange membrane fuel cells

Fei Xiao et al.

Summary: Researchers have designed a hybrid electrocatalyst consisting of atomically dispersed platinum and iron single atoms, as well as platinum-iron alloy nanoparticles. This electrocatalyst exhibits higher activity and durability in proton exchange membrane fuel cells.

NATURE CATALYSIS (2022)

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Article Chemistry, Multidisciplinary

Boosting Oxygen Reduction via Integrated Construction and Synergistic Catalysis of Porous Platinum Alloy and Defective Graphitic Carbon

Lei Huang et al.

Summary: Integrated fabrication of porous Pt-rich alloy encapsulated by graphitic carbon via integration engineering exhibits optimized reaction pathway and improved oxygen reduction reaction performance. The hybrid catalyst outperforms commercial Pt/C catalyst in full-cell assessment, attributed to the mutual assistance between porous Pt alloy and Co-N-C.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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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)

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Article Chemistry, Physical

Cobalt single atom site isolated Pt nanoparticles for efficient ORR and HER in acid media

Lvhan Liang et al.

Summary: By utilizing the isolating effect of cobalt single atoms on platinum, strong interaction between cobalt single atoms and platinum, and the confinement of the metal organic framework-derived porous carbon matrix, platinum nanoparticles were successfully evenly immobilized on a nitrogen-doped carbon matrix with rich cobalt single atoms as multiple active sites. This not only increased the active centers, but also promoted catalysis kinetics, significantly improving catalytic activity for oxygen reduction and hydrogen evolution reactions.

NANO ENERGY (2021)

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Article Chemistry, Applied

3D star-like atypical hybrid MOF derived single-atom catalyst boosts oxygen reduction catalysis

Lei Zhou et al.

Summary: A 3D hybrid MOF composed of cobalt doped ZIF-L and ZIF-8 was demonstrated as an advanced precursor for making Co SACs to greatly boost ORR. The newly synthesized Co-SA-N-C exhibited excellent ORR activity, outperforming commercial Pt/C and showing high performance in acidic medium.

JOURNAL OF ENERGY CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

N-Doped Carbon Nanotubes Derived from Graphene Oxide with Embedment of FeCo Nanoparticles as Bifunctional Air Electrode for Rechargeable Liquid and Flexible All-Solid-State Zinc-Air Batteries

Xiaoqiong Hao et al.

Summary: This work presents a novel synthesis method for efficient and durable bifunctional oxygen electrocatalysts, NPC/FeCo@NCNTs, which can be used for oxygen evolution and oxygen reduction reactions. The catalyst shows superior catalytic performance compared to other reported bifunctional catalysts, and can improve the performance of zinc-air batteries.

ADVANCED SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Electrospinning Synthesis of Self-Standing Cobalt/Nanocarbon Hybrid Membrane for Long-Life Rechargeable Zinc-Air Batteries

Chenfeng Xia et al.

Summary: A self-standing membrane composed of hierarchical cobalt/nanocarbon nanofibers was fabricated using the electrospinning technique, which can be directly utilized as the bifunctional air electrode in zinc-air batteries to achieve high peak power density and long service life. The assembled solid-state zinc-air battery exhibits promising power density and decent flexibility, thanks to the integration of oxygen electrocatalysts with abundant cobalt-nitrogen-carbon active species in the hierarchical electrode structure.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Pt-Co@Pt Octahedral Nanocrystals: Enhancing Their Activity and Durability toward Oxygen Reduction with an Intermetallic Core and an Ultrathin Shell

Minghao Xie et al.

Summary: In this study, Pt-Co@Pt octahedral nanocrystals were successfully synthesized with an intermetallic Pt-Co core and an ultrathin Pt shell dominated by {111} facets on the surface. These nanocrystals showed significantly improved catalytic performance towards the oxygen reduction reaction compared to a commercial Pt/C catalyst, with a mass activity 13.4 times higher and a specific activity 29.5 times higher. Importantly, the mass activity of the nanocrystals only decreased by 21% after 30,000 cycles of accelerated durability testing, indicating their outstanding potential as catalysts for ORR and related reactions.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Multidisciplinary Sciences

Subsize Pt-based intermetallic compound enables long-term cyclic mass activity for fuel-cell reduction

Han Cheng et al.

Summary: By breaking the size limitation in Pt alloy systems, subsize Pt-based intermetallic compounds can simultaneously optimize MA and durability. Furthermore, the subsize scale was found to enhance the stability of membrane electrodes, preventing catalyst poisoning by ionomers in humid fuel-cell conditions.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2021)

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Article Chemistry, Physical

Flexible carbon nanofiber film with diatomic Fe-Co sites for efficient oxygen reduction and evolution reactions in wearable zinc-air batteries

Yiyan Wang et al.

Summary: This study developed a highly efficient strategy for preparing large-area flexible CNF films with excellent bifunctional catalytic performance, achieved optimal electronic properties for ORR and OER through abundant FeN3-CoN3 sites. The resulting ZAB not only has high specific power and cycling stability, but also the excellent mechanical properties of Fe1Co1-CNF make it suitable for manufacturing portable ZAB with deformability and stability.

NANO ENERGY (2021)

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Article Chemistry, Multidisciplinary

Atomically dispersed single iron sites for promoting Pt and Pt3Co fuel cell catalysts: performance and durability improvements

Zhi Qiao et al.

Summary: Integrating PGM-free atomically-dispersed single metal active sites in the carbon support can effectively enhance the performance of PGM catalysts, achieving higher efficiency and sustainability with lower loading. The synergistic interaction between Pt clusters and surrounding FeN4 sites enhances the intrinsic activity of Pt, leading to significantly improved overall catalytic performance and stability.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Review Chemistry, Multidisciplinary

Pyrolyzed M-Nx catalysts for oxygen reduction reaction: progress and prospects

Ergui Luo et al.

Summary: Recent research efforts on cost-effective catalysts in fuel cells, especially on the cathode, have shown promising advancements in the development of M-N-x/C materials. The focus has been on clarifying the nature of catalytic sites and utilizing advanced characterization tools to optimize synthesis methodologies. Future directions aim to achieve rational and controllable synthesis of catalysts with sufficient active sites and strategies to mitigate catalyst degradation.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Co, Fe codoped holey carbon nanosheets as bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries

Xueting Zhang et al.

Summary: The CoFe@HNSs exhibited remarkable bifunctional oxygen electrocatalytic activity and high-power density in rechargeable Zn-air batteries, showing potential for energy storage and conversion applications.

CHEMICAL COMMUNICATIONS (2021)

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Article Chemistry, Physical

High-Performance Trifunctional Electrocatalysts Based on FeCo/Co2P Hybrid Nanoparticles for Zinc-Air Battery and Self-Powered Overall Water Splitting

Qing Shi et al.

ADVANCED ENERGY MATERIALS (2020)

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Review Chemistry, Multidisciplinary

Chemical Synthesis of Single Atomic Site Catalysts

Shufang Ji et al.

CHEMICAL REVIEWS (2020)

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Article Chemistry, Multidisciplinary

Single Cobalt Sites Dispersed in Hierarchically Porous Nanofiber Networks for Durable and High-Power PGM-Free Cathodes in Fuel Cells

Yanghua He et al.

ADVANCED MATERIALS (2020)

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Review Chemistry, Multidisciplinary

Advanced transition metal/nitrogen/carbon-based electrocatalysts for fuel cell applications

Tang Tang et al.

SCIENCE CHINA-CHEMISTRY (2020)

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Review Chemistry, Multidisciplinary

Heteroatom-doped carbon catalysts for zinc-air batteries: progress, mechanism, and opportunities

Xiaofeng Zhu et al.

ENERGY & ENVIRONMENTAL SCIENCE (2020)

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Review Chemistry, Multidisciplinary

Advanced Electrocatalysts with Single-Metal-Atom Active Sites

Yuxuan Wang et al.

CHEMICAL REVIEWS (2020)

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Article Chemistry, Physical

Highly efficient catalysts for oxygen reduction using well-dispersed iron carbide nanoparticles embedded in multichannel hollow nanofibers

Hongyin Xia et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

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Article Chemistry, Multidisciplinary

Engineering bimetal Cu, Co sites on 3D N-doped porous carbon nanosheets for enhanced oxygen reduction electrocatalysis

Lingzhi Lu et al.

CHEMICAL COMMUNICATIONS (2020)

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Article Chemistry, Physical

Carbon aerogels with atomic dispersion of binary iron-cobalt sites as effective oxygen catalysts for flexible zinc-air batteries

Yang Chen et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

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Article Chemistry, Multidisciplinary

Electrospun MOF-Based FeCo Nanoparticles Embedded in Nitrogen-Doped Mesoporous Carbon Nanofibers as an Efficient Bifunctional Catalyst for Oxygen Reduction and Oxygen Evolution Reactions in Zinc-Air Batteries

Lijuan Yang et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2019)

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Article Chemistry, Multidisciplinary

Dispersed Nickel Cobalt Oxyphosphide Nanoparticles Confined in Multichannel Hollow Carbon Fibers for Photocatalytic CO2 Reduction

Yan Wang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2019)

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Article Chemistry, Physical

A facile method to conduct 3D self-supporting Co-FeCo/N-doped graphene-like carbon bifunctional electrocatalysts for flexible solid-state zinc air battery

Qiuyan Jin et al.

APPLIED CATALYSIS B-ENVIRONMENTAL (2019)

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Article Chemistry, Multidisciplinary

Engineering Energy Level of Metal Center: Ru Single-Atom Site for Efficient and Durable Oxygen Reduction Catalysis

Meiling Xiao et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Article Chemistry, Physical

Ternary MnO/CoMn alloy@N-doped graphitic composites derived from a bi-metallic pigment as bi-functional electrocatalysts

Chen Deng et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Review Chemistry, Physical

Rational Design of Transition Metal-Based Materials for Highly Efficient Electrocatalysis

Shuo Dou et al.

SMALL METHODS (2019)

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Article Chemistry, Physical

Facile synthesis of polyacrylonitrile-based N/S-codoped porous carbon as an efficient oxygen reduction electrocatalyst for zinc-air batteries

Guodong Li et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Review Chemistry, Physical

Recent Advances for MOF-Derived Carbon-Supported Single-Atom Catalysts

Aijuan Han et al.

SMALL METHODS (2019)

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Article Chemistry, Multidisciplinary

Theory-driven design of high-valence metal sites for water oxidation confirmed using in situ soft X-ray absorption

Xueli Zheng et al.

NATURE CHEMISTRY (2018)

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Article Chemistry, Multidisciplinary

Porous Iron-Cobalt Alloy/Nitrogen-Doped Carbon Cages Synthesized via Pyrolysis of Complex Metal-Organic Framework Hybrids for Oxygen Reduction

Bu Yuan Guan et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

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Article Chemistry, Physical

Facile preparation of efficient electrocatalysts for oxygen reduction reaction: One-dimensional meso/macroporous cobalt and nitrogen Co-doped carbon nanofibers

Ki Ro Yoon et al.

JOURNAL OF POWER SOURCES (2018)

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Anchoring PdCu Amorphous Nanocluster on Graphene for Electrochemical Reduction of N2 to NH3 under Ambient Conditions in Aqueous Solution

Miao-Miao Shi et al.

ADVANCED ENERGY MATERIALS (2018)

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Article Chemistry, Multidisciplinary

Fe, Cu-Coordinated ZIF-Derived Carbon Framework for Efficient Oxygen Reduction Reaction and Zinc-Air Batteries

Zhihao Wang et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

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Article Chemistry, Physical

Confined Pyrolysis within a Nanochannel to Form a Highly Efficient Single Iron Site Catalyst for Zn-Air Batteries

Zheng Kun Yang et al.

ACS ENERGY LETTERS (2018)

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Correction Electrochemistry

Carbon-Based Metal-Free Electrocatalysis for Energy Conversion, Energy Storage, and Environmental Protection (vol 1, pg 84, 2018)

Chuangang Hu et al.

ELECTROCHEMICAL ENERGY REVIEWS (2018)

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Single Cobalt Atom and N Codoped Carbon Nanofibers as Highly Durable Electrocatalyst for Oxygen Reduction Reaction

Qingqing Cheng et al.

ACS CATALYSIS (2017)

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Article Chemistry, Physical

Quaternary FeCoNiMn-Based Nanocarbon Electrocatalysts for Bifunctional Oxygen Reduction and Evolution: Promotional Role of Mn Doping in Stabilizing Carbon

Shiva Gupta et al.

ACS CATALYSIS (2017)

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Article Chemistry, Multidisciplinary

Single Cobalt Atoms with Precise N-Coordination as Superior Oxygen Reduction Reaction Catalysts

Peiqun Yin et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2016)

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Understanding the High Activity of Fe-N-C Electrocatalysts in Oxygen Reduction: Fe/Fe3C Nanoparticles Boost the Activity of Fe-Nx

Wen-Jie Jiang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2016)

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Achieving efficient oxygen reduction on ultra-low metal-loaded electrocatalysts by constructing well-dispersed bimetallic sites and interconnected porous channels

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