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Title: | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media | Authors: | Zhai, L She, X Zhuang, L Li, Y Ding, R Guo, X Zhang, Y Zhu, Y Xu, K Fan, HJ Lau, SP |
Issue Date: | 28-Mar-2022 | Source: | Angewandte chemie international edition, Mar. 28, 2022, v. 61, no. 14, e202116057 | 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. | Publisher: | Wiley-VCH | Journal: | Angewandte chemie international edition | ISSN: | 1433-7851 | EISSN: | 1521-3773 | DOI: | 10.1002/anie.202116057 | Rights: | © 2022 Wiley-VCH GmbH This is the peer reviewed version of the following article: 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, which has been published in final form at https://doi.org/10.1002/anie.202116057. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited. |
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