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Title: Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media
Authors: Zhai, Lingling
She, Xiaojie
Zhuang, Lyuchao
Li, Yanyong
Ding, Ran
Guo, Xuyun
Zhang, Yongqi
Zhu, Ye
Xu, Kun
Fan, Hong Jin
Lau, Shu Ping
Keywords: Science::Physics
Issue Date: 2022
Source: Zhai, L., She, X., Zhuang, L., Li, Y., Ding, R., Guo, X., Zhang, Y., Zhu, Y., Xu, K., Fan, H. J. & Lau, S. P. (2022). Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media. Angewandte Chemie International Edition, 61(14), e202116057-.
Project: A1983c0026
Journal: Angewandte Chemie International Edition
Abstract: Work function strongly impacts the surficial charge distribution, especially for metal-support electrocatalysts when a built-in electric field (BEF) is constructed. Therefore, studying the correlation between work function and BEF is crucial for understanding the intrinsic reaction mechanism. Herein, we present a Pt@CoOx electrocatalyst with a large work function difference (ΔΦ) and strong BEF, which shows outstanding hydrogen evolution activity in a neutral medium with a 4.5-fold mass activity higher than 20 % Pt/C. Both experimental and theoretical results confirm the interfacial charge redistribution induced by the strong BEF, thus subtly optimizing hydrogen and hydroxide adsorption energy. This work not only provides fresh insights into the neutral hydrogen evolution mechanism but also proposes new design principles toward efficient electrocatalysts for hydrogen production in a neutral medium.
ISSN: 1433-7851
DOI: 10.1002/anie.202116057
Rights: © 2022 Wiley-VCHGmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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