期刊
CHINESE JOURNAL OF CATALYSIS
卷 43, 期 1, 页码 130-138出版社
ELSEVIER
DOI: 10.1016/S1872-2067(21)63856-1
关键词
Electrocatalysis; Acidic oxygen evolution reaction; Ruthenium oxide; In situ Raman; Proton-coupled electron transfer
资金
- National Natural Science Foundation of China [21875042, 21634003, 51573027]
- Ministry of Science and Technolo-gy of the People's Republic of China [2016YFA0203302]
- Shanghai Municipal Committee of Science and Technology [18QA140080, 16JC1400702]
- Program for Eastern Scholars at Shanghai Institutions
This study presents a RuPbOx electrocatalyst for efficient and stable water oxidation in acid. The incorporation of Pb leads to the formation of superoxide precursors, which improves the kinetics of the oxygen evolution reaction.
The acidic oxygen evolution reaction (OER) is central to water electrolysis using proton-exchange membranes. However, even as benchmark catalysts in the acidic OER, Ru-based catalysts still suffer from sluggish kinetics owing to the scaling relationship that arises from the traditional concerted proton-electron transfer (CPET) process. Motivated by the knowledge that a charged surface may be favorable for accelerating the OER kinetics, we posited the incorporation of elements with pseudocapacitive properties into Ru-based catalysts. Herein, we report a RuPbOx electrocatalyst for efficient and stable water oxidation in acid with a low overpotential of 191 mV to reach 10 mA cm(-2) and a low Tafel slope of 39 mV dec(-1). The combination of electrochemical analysis, X-ray photoelectron spectroscopy, and in situ Raman spectroscopy demonstrated that the improved OER kinetics was associated with the formation of superoxide precursors on the strongly charged surface after Pb incorporation, indicating a non-concerted proton-electron transfer mechanism for the OER on RuPbOx. (C) 2022, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据