Phase‐Engineered Bi‐RuO <sub>2</sub> Single‐Atom Alloy Oxide Boosting Oxygen Evolution Electrocatalysis in Proton Exchange Membrane Water Electrolyzer
Abstract
Abstract Engineering nanomaterials at single‐atomic sites can enable unprecedented catalytic properties for broad applications, yet it remains challenging to do so on RuO 2 ‐based electrocatalysts for proton exchange membrane water electrolyzer (PEMWE). Herein, the rational design and construction of Bi‐RuO 2 single‐atom alloy oxide (SAAO) are presented to boost acidic oxygen evolution reaction (OER), via phase engineering a novel hexagonal close packed ( hcp ) RuBi single‐atom alloy. This Bi‐RuO 2 SAAO electrocatalyst exhibits a low overpotential of 192 mV and superb stability over 650 h at 10 mA cm −2 , enabling a practical PEMWE that needs only 1.59 V to reach 1.0 A cm −2 under industrial conditions. Operando differential electrochemical mass spectroscopy analysis, coupled with density functional theory studies, confirmed the adsorbate‐evolving mechanism on Bi‐RuO 2 SAAO and that the incorporation of Bi 1 improves the activity by electronic density optimization and the stability by hindering surface Ru demetallation. This work not only introduces a new strategy to fabricate high‐performance electrocatalysts at atomic‐level, but also demonstrates their potential use in industrial electrolyzers.
Article Details
Authors (12)
Zhichao Yang
Yutian Ding
Shenzhen Key Laboratory of Energy Electrocatalytic Materials, Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Materials Science and Engineering
Wen Chen
Department of Immunology, St. Jude Children’s Research Hospital
Shuiping Luo
Shenzhen Key Laboratory of Energy Electrocatalytic Materials, College of Materials Science and Engineering, Shenzhen University 2 , Shenzhen, Guangdong 518055,
Daofan Cao
Department of Chemistry Southern University of Science and Technology (SUSTech) Shenzhen Guangdong 518055 P. R. China
Xin Long
Department of Mechanical Engineering
Lei Xie
Xincheng Zhou
Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University 1 , Yichang 443002, Hubei,
Xinyi Cai
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering
Ke Liu
Xian‐Zhu Fu
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering, Shenzhen University Shenzhen Guangdong China
Jing‐Li Luo
Shenzhen Key Laboratory of Energy Electrocatalytic Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering, Shenzhen University Shenzhen Guangdong China