Superiority of Dual‐Atom Catalysts in Electrocatalysis: One Step Further Than Single‐Atom Catalysts

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(9)

Published: Jan. 18, 2022

Abstract In recent years, dual‐atom catalysts (DACs) have attracted extensive attention, as an extension of single‐atom (SACs). Compared with SACs, DACs higher metal loading and more complex flexible active sites, thus achieving better catalytic performance providing opportunities for electrocatalysis. This review introduces the research progress in years on how to design new enhance Firstly, advantages increasing are introduced. Then, role changing adsorption condition reactant molecules atoms is discussed. Moreover, ways which can reduce reaction energy barrier key steps change path explored. Catalytic applications different electrocatalytic reactions, including carbon dioxide reduction reaction, oxygen evolution hydrogen nitrogen followed. Finally, a brief summary made challenges prospects

Language: Английский

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A Tandem Strategy for Enhancing Electrochemical CO₂ Reduction Activity of Single‐Atom Cu‐S₁N₃ Catalysts via Integration with Cu Nanoclusters

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(45), P. 24022 - 24027

Published: Sept. 9, 2021

We developed a tandem electrocatalyst for CO2 -to-CO conversion comprising the single Cu site co-coordinated with N and S anchored carbon matrix (Cu-S1 N3 ) atomically dispersed clusters (Cux ), denoted as Cu-S1 /Cux . The as-prepared composite presents 100 % Faradaic efficiency towards CO generation (FECO at -0.65 V vs. RHE high FECO over 90 from -0.55 to -0.75 V, outperforming analogues Cu-N4 only 54 -0.7 V) 70 configurations. unsymmetrical atomic interface in basal plane possesses an optimized binding energy key intermediate *COOH compared site. At same time, adjacent Cux effectively promotes protonation of *CO2- by accelerating water dissociation offering *H active sites. This work provides strategy facilitating proton-coupled electron transfer atomic-level catalytic

Language: Английский

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

Advanced Science, Journal Year: 2021, Volume and Issue: 8(23)

Published: Oct. 23, 2021

Abstract The highly efficient energy conversion of the polymer‐electrolyte‐membrane fuel cell (PEMFC) is extremely limited by sluggish oxygen reduction reaction (ORR) kinetics and poor electrochemical stability catalysts. Hitherto, to replace costly Pt‐based catalysts, non‐noble‐metal ORR catalysts are developed, among which transition metal–heteroatoms–carbon (TM–H–C) materials present great potential for industrial applications due their outstanding catalytic activity low expense. However, during testing in a two‐electrode system high complexity have become big barrier commercial applications. Thus, herein, simplify research, typical Fe–N–C material with relatively simple constitution structure, selected as model catalyst TM–H–C explore improve such kind Then, different types active sites (centers) coordination systematically summarized discussed, possible attenuation mechanism strategies analyzed. Finally, some challenges faced prospects proposed shed light on future development trend advanced catalysis.

Language: Английский

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

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(37)

Published: Aug. 26, 2021

Abstract Proton exchange membrane fuel cells (PEMFCs) are a highly efficient hydrogen energy conversion technology, which shows great potential in mitigating carbon emissions and the crisis. Currently, to accelerate kinetics of oxygen reduction reaction (ORR) required for PEMFCs, extensive utilization expensive rare platinum‐based catalysts at cathodic side, impeding their large‐scale commercialization. In response this issue, atomically dispersed metal–nitrogen–carbon (M–N–C) with cost‐effectiveness, encouraging activity, unique advantages (e.g., homogeneous activity sites, high atom efficiency, intrinsic activity) have been widely investigated. Considerable progress domain has witnessed past decade. Herein, comprehensive summary recent development M–N–C ORR under acidic conditions application electrode assembly (MEA) PEM cells, presented. The mechanisms, composition, operating principles PEMFCs introduced. Thereafter, towards improved MEA performance is summarized detail, improvement strategies stability systematically analyzed. Finally, remaining challenges significant research directions design high‐performance discussed.

Language: Английский

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Multi-atom cluster catalysts for efficient electrocatalysis

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(21), P. 8923 - 8956

Published: Jan. 1, 2022

This review presents recent developments in the synthesis, modulation and characterization of multi-atom cluster catalysts for electrochemical energy applications.

Language: Английский

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Dual-atom catalysts for oxygen electrocatalysis

Nano Energy, Journal Year: 2022, Volume and Issue: 104, P. 107927 - 107927

Published: Oct. 28, 2022

Language: Английский

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Recent progress and prospect of carbon-free single-site catalysts for the hydrogen and oxygen evolution reactions

Nano Research, Journal Year: 2021, Volume and Issue: 15(2), P. 818 - 837

Published: Aug. 7, 2021

Language: Английский

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Tunable CO/H ₂ ratios of electrochemical reduction of CO ₂ through the Zn-Ln dual atomic catalysts

Science Advances, Journal Year: 2021, Volume and Issue: 7(47)

Published: Nov. 19, 2021

Dual-metal atomic catalysts produce flexible ratios of syngas products.

Language: Английский

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The strain induced synergistic catalysis of FeN4 and MnN3 dual-site catalysts for oxygen reduction in proton- /anion- exchange membrane fuel cells

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121770 - 121770

Published: July 20, 2022

Language: Английский

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Structural optimization of carbon-based diatomic catalysts towards advanced electrocatalysis

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 492, P. 215288 - 215288

Published: June 12, 2023

Language: Английский

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