A Co-Doped Nanorod-like RuO2 Electrocatalyst with Abundant Oxygen Vacancies for Acidic Water Oxidation
Yuanyuan Tian,
Shuo Wang,
Ever Velasco,
Yueping Yang,
Lujie Cao,
Linjuan Zhang,
Xing Li,
Yichao Lin,
Qiuju Zhang,
Liang Chen
Affiliations
Yuanyuan Tian
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
Shuo Wang
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China
Ever Velasco
Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
Yueping Yang
State Grid Ningbo Electric Power Supply Company, Ningbo, Zhejiang 315000, P.R. China
Lujie Cao
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
Linjuan Zhang
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P.R. China
Xing Li
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, P. R. China
Yichao Lin
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; Corresponding author
Qiuju Zhang
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; Corresponding author
Liang Chen
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P.R. China; University of Chinese Academy of Sciences, Beijing 100049, P. R. China; Corresponding author
Summary: Active and highly stable electrocatalysts for oxygen evolution reaction (OER) in acidic media are currently in high demand as a cleaner alternative to the combustion of fossil fuels. Herein, we report a Co-doped nanorod-like RuO2 electrocatalyst with an abundance of oxygen vacancies achieved through the facile, one-step annealing of a Ru-exchanged ZIF-67 derivative. The compound exhibits ultra-high OER performance in acidic media, with a low overpotential of 169 mV at 10 mA cm−2 while maintaining excellent activity, even when exposed to a 50-h galvanostatic stability test at a constant current of 10 mA cm−2. The dramatic enhancement in OER performance is mainly attributed to the abundance of oxygen vacancies and modulated electronic structure of the Co-doped RuO2 that rely on a vacancy-related lattice oxygen oxidation mechanism (LOM) rather than adsorbate evolution reaction mechanism (AEM), as revealed and supported by experimental characterizations as well as density functional theory (DFT) calculations. : Catalysis; Electrochemical Energy Production; Nanomaterials Subject Areas: Catalysis, Electrochemical Energy Production, Nanomaterials
