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Active Sites and Mechanisms for Oxygen Reduction Reaction on Nitrogen-Doped Carbon Alloy Catalysts: Stone–Wales Defect and Curvature Effect

Chai, Guo-Liang, Hou, Zhufeng, Shu, Da-Jun, Ikeda, Takashi, Terakura, Kiyoyuki·2014·Journal of the American Chemical Society

Abstract

Carbon alloy catalysts (CACs) are promising oxygen reduction reaction (ORR) catalysts to substitute platinum. However, despite extensive studies on CACs, the reaction sites and mechanisms for ORR are still in controversy. Herein, we present rather general consideration on possible ORR mechanisms for various structures in nitrogen doped CACs based on the first-principles calculations. Our study indicates that only a particular structure of a nitrogen pair doped Stone-Wales defect provides a good active site. The ORR activity of this structure can be tuned by the curvature around the active site, which makes its limiting potential approaching the maximum limiting potential (0.80 V) in the volcano plot for the ORR activity of CACs. The calculated results can be compared with the recent experimental ones of the half-wave potential for CAC systems that range from 0.60 to 0.80 V in the reversible-hydrogen-electrode (RHE) scale.

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Metadata

Authors
Chai, G.-L., Hou, Z., Shu, D.-J., Ikeda, T., & Terakura, K.
Venue
Journal of the American Chemical Society
Published
2014-09-23
Volume
136
Issue
39
Pages
13629-13640
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2020436181
Cited by
323
References
4
FWCI
8.73
Type
journal article
Language
en
Open access
closed

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