钌
分解水
过电位
氧化物
析氧
电解
催化作用
材料科学
电化学
制氢
化学物理
电解水
氢
化学工程
无机化学
化学
物理化学
光催化
冶金
电极
有机化学
工程类
电解质
生物化学
作者
Chun Hu,Kaihang Yue,Jiajia Han,Xiaozhi Liu,Lijia Liu,Qiunan Liu,Qingyu Kong,Chih‐Wen Pao,Z. Hu,Kazu Suenaga,Dong Su,Qiaobao Zhang,Xianying Wang,Yuan‐Zhi Tan,Bolong Huang
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2023-09-15
卷期号:9 (37)
被引量:5
标识
DOI:10.1126/sciadv.adf9144
摘要
Designing an efficient catalyst for acidic oxygen evolution reaction (OER) is of critical importance in manipulating proton exchange membrane water electrolyzer (PEMWE) for hydrogen production. Here, we report a fast, nonequilibrium strategy to synthesize quinary high-entropy ruthenium iridium-based oxide (M-RuIrFeCoNiO2) with abundant grain boundaries (GB), which exhibits a low overpotential of 189 millivolts at 10 milliamperes per square centimeter for OER in 0.5 M H2SO4. Microstructural analyses, density functional calculations, and isotope-labeled differential electrochemical mass spectroscopy measurements collectively reveal that the integration of foreign metal elements and GB is responsible for the enhancement of activity and stability of RuO2 toward OER. A PEMWE using M-RuIrFeCoNiO2 catalyst can steadily operate at a large current density of 1 ampere per square centimeter for over 500 hours. This work demonstrates a pathway to design high-performance OER electrocatalysts by integrating the advantages of various components and GB, which breaks the limits of thermodynamic solubility for different metal elements.
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