A Highly Efficient pH-Universal HOR Catalyst with Engineered Electronic Structures of Single Pt Sites by Isolated Co Atoms |
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| Authors: | Zeyi Huang Ruihu Lu Yuezhou Zhang Wen Chen Guanzhen Chen Chao Ma Ziyun Wang Yunhu Han Wei Huang |
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| Affiliation: | 1. Institute of Flexible Electronics (IFE), Ningbo Institute and Frontiers Science Center for Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072 China;2. School of Chemical Sciences, The University of Auckland, Auckland, 1010 New Zealand;3. Department of Chemistry, Tsinghua University, Beijing, 100084 China |
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| Abstract: | Developing a high-efficiency, stable, and CO-toxicant-resistant low-cost hydrogen oxidation reaction (HOR) electrocatalyst is challenging but is vital for practical proton/anion exchange membrane fuel cells. Herein, an efficient pH-universal HOR catalyst Pt1@Co1CN is fabricated, in which the electronic structure of single Pt sites is modulated by isolated Co atoms pre-anchored on nitrogen-doped carbon. Pt1@Co1CN exhibits superior HOR activity and durability under pH-universal media than Pt1@CN (anchored single Pt atoms on nitrogen-doped carbon) and commercial PtRu/C and Pt/C. More importantly, Pt1@Co1CN possesses much better CO anti-poisoning ability than Pt1@CN and commercial PtRu/C and Pt/C. It is speculated that the superior pH-universal HOR performance can be attributed to the inter-regulation of adjacent Co and Pt sites, leading to the downshift of anti-bonding state and consequently strengthening the *H adsorption, which promotes the kinetics of HOR. |
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| Keywords: | anti-CO poisoning dual-atom catalysts electrocatalysts hydrogen oxidation reaction |
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