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https://hdl.handle.net/2440/136460
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Type: | Journal article |
Title: | Cation-Vacancy-Enriched Nickel Phosphide for Efficient Electrosynthesis of Hydrogen Peroxides |
Author: | Zhou, Z. Kong, Y. Tan, H. Huang, Q. Wang, C. Pei, Z. Wang, H. Liu, Y. Wang, Y. Li, S. Liao, X. Yan, W. Zhao, S. |
Citation: | Advanced Materials, 2022; 34(16) |
Publisher: | Wiley-VCH GmbH |
Issue Date: | 2022 |
ISSN: | 0935-9648 1521-4095 |
Statement of Responsibility: | Zheng Zhou, Yuan Kong, Hao Tan, Qianwei Huang, Cheng Wang, Zengxia Pei, Haozhu Wang, Yangyang Liu, Yihan Wang, Sai Li, Xiaozhou Liao, Wensheng Yan, and Shenlong Zhao |
Abstract: | Electrocatalytic hydrogen peroxide (H₂O₂) synthesis via the two-electron oxygen reduction reaction (2e ORR) pathway is becoming increasingly important due to the green production process. Here, cationic vacancies on nickel phosphide, as a proof-of-concept to regulate the catalyst's physicochemical properties, are introduced for efficient H₂O₂ electrosynthesis. The as-fabricated Ni cationic vacancies (VNi)-enriched Ni₂–ₓP-VNi electrocatalyst exhibits remarkable 2e ORR performance with H₂O₂ molar fraction of >95% and Faradaic efficiencies of >90% in all pH conditions under a wide range of applied potentials. Impressively, the as-created VNi possesses superb long-term durability for over 50 h, suppassing all the recently reported catalysts for H₂O₂ electrosynthesis. Operando X-ray absorption near-edge spectroscopy (XANES) and synchrotron Fourier transform infrared (SR-FTIR) combining theoretical calculations reveal that the excellent catalytic performance originates from the VNi -induced geometric and electronic structural optimization, thus promoting oxygen adsorption to the 2e ORR favored "end-on" configuration. It is believed that the demonstrated cation vacancy engineering is an effective strategy toward creating active heterogeneous catalysts with atomic precision. |
Keywords: | cation vacancy engineering electrocatalysis green production hydrogen peroxide production oxygen reduction reaction |
Rights: | © 2022 Wiley-VCH GmbH |
DOI: | 10.1002/adma.202106541 |
Published version: | http://dx.doi.org/10.1002/adma.202106541 |
Appears in Collections: | Chemical Engineering publications |
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