Asymmetric Dual‐Atomic Catalyst with Axial Chloride Coordination for Efficient Oxygen Reduction Reaction DOI
Yan Zhang, Fuhua Li, Shuwei Li

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 29, 2025

Abstract Low‐platinum‐group metal (low‐PGM) catalysts play a crucial role in reducing the cost of proton exchange membrane fuel cells (PEMFCs). Dual‐atomic offer valuable solutions due to their exceptional performance. This work explores application axial Cl‐coordinated Pt─Co dual atoms on N‐doped graphitic carbon (Pt 1 Co /NC─Cl) utilizing PtCo dual‐atomic catalysts, demonstrating ability significantly enhance acidic oxygen reduction reaction (ORR) catalytic performance conventional catalysts. The half‐wave potential (E 1/2 ) reaches 0.841 V 0.1 M HClO 4 solution, and only 12 mV E is observed after 5000 cycles. Axial Cl proves be resistant removal during electroreduction reaction. Consequently, use heteroatom‐modulated asymmetric structures can greatly improve Pt‐based Incorporating nonmetallic synergistic Pt‐group metals presents promising solution for achieving high‐performance Low‐PGMs.

Language: Английский

Hydrogen‐Bond‐Assisted Synthesis of Single‐Atom and Nanocluster Synergistic Sites for Enhanced Oxygen Reduction Reaction DOI

Xue Lu,

Fei Xiang,

Shaoyi Li

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Electrocatalysts combining metal single‐atom and nanocluster synergy are promising alternatives to platinum‐based catalysts for oxygen reduction reaction (ORR). However, controllable synthesis of such with high ORR performance remains challenging due atom aggregation into large nanoparticles. Here, a hydrogen‐bond network confinement approach construct Co Co‐N x ‐C moiety coexisting active sites on nitrogen‐doped porous carbon highly long‐term stable is reported. The optimized Co@Co‐N‐C catalyst exhibits half‐wave potential (E 1/2 ) 0.92 V versus RHE limiting current density (J L 6.02 mA cm −2 ORR, presenting 40 mV positive shift in E than the competitor highest J 15.7% improvement over most . enhanced catalytic originates from between moieties, which modulates electronic structure Co‐based improves electrochemically surface area. zinc‐air battery assembled delivers specific capacity 870 mAh g −1 maximum discharge power 210 mW , representing ≈52% Pt/C‐based devices. This hydrogen‐bond‐assisted strategy opens pathways designing high‐performing diversified fields beyond including water splitting, CO 2 reduction, nitrogen reduction.

Language: Английский

Citations

0
Asymmetric Dual‐Atomic Catalyst with Axial Chloride Coordination for Efficient Oxygen Reduction Reaction DOI
Yan Zhang, Fuhua Li, Shuwei Li

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 29, 2025

Abstract Low‐platinum‐group metal (low‐PGM) catalysts play a crucial role in reducing the cost of proton exchange membrane fuel cells (PEMFCs). Dual‐atomic offer valuable solutions due to their exceptional performance. This work explores application axial Cl‐coordinated Pt─Co dual atoms on N‐doped graphitic carbon (Pt 1 Co /NC─Cl) utilizing PtCo dual‐atomic catalysts, demonstrating ability significantly enhance acidic oxygen reduction reaction (ORR) catalytic performance conventional catalysts. The half‐wave potential (E 1/2 ) reaches 0.841 V 0.1 M HClO 4 solution, and only 12 mV E is observed after 5000 cycles. Axial Cl proves be resistant removal during electroreduction reaction. Consequently, use heteroatom‐modulated asymmetric structures can greatly improve Pt‐based Incorporating nonmetallic synergistic Pt‐group metals presents promising solution for achieving high‐performance Low‐PGMs.

Language: Английский

Citations

0