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  4. Well-Defined Co2 Dual-Atom Catalyst Breaks Scaling Relations of Oxygen Reduction Reaction
 
research article

Well-Defined Co2 Dual-Atom Catalyst Breaks Scaling Relations of Oxygen Reduction Reaction

Sun, Qidi
•
Yue, Xian
•
Yu, Linke
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December 11, 2024
Journal of the American Chemical Society

The 4-electron oxygen reduction reaction (ORR) under alkaline conditions is central to the development of non-noble metal-based hydrogen fuel cell technologies. However, the kinetics of ORR are constrained by scaling relations, where the adsorption free energy of *OOH is intrinsically linked to that of *OH with a nearly constant difference larger than the optimal value. In this study, a well-defined binuclear Co2 complex was synthesized and adsorbed onto carbon black, serving as a model dual-atom catalyst. This catalyst achieved a record half-wave potential of 0.972 V versus the reversible hydrogen electrode in an alkaline electrolyte. Density functional theory simulations and in situ infrared spectroscopy revealed that the dual-atom site stabilizes the *OOH intermediate through bidentate coordination, thereby reducing the free energy gap between *OOH and *OH. By altering the adsorption configuration of *OOH on the dual-atom site, the scaling relations are effectively disrupted, leading to a significant enhancement in ORR activity.

  • Details
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Type
research article
DOI
10.1021/jacs.4c12705
Web of Science ID

WOS:001375004500001

Author(s)
Sun, Qidi
Yue, Xian
Yu, Linke
Li, Fu-Zhi
Zheng, Yiwei  

EPFL

Liu, Meng-Ting
Peng, Jian-Zhao
Hu, Xile  

EPFL

Chen, Hao Ming
Li, Lei
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Date Issued

2024-12-11

Publisher

AMER CHEMICAL SOC

Published in
Journal of the American Chemical Society
Volume

146

Issue

51

Subjects

TRANSITION-METALS

•

PLATINUM

•

SITES

•

IDENTIFICATION

•

Science & Technology

•

Physical Sciences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSCI  
FunderFunding(s)Grant NumberGrant URL

National Natural Science Foundation of China (NSFC)

22272073;22179058

Shenzhen Science and Technology Program

JCYJ20210324104414039, JCYJ20220818100410023, KCXST20221021111207017

Guangdong Grants

2021ZT09C064

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Available on Infoscience
January 6, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/242543
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