RuO2/CoMo2Ox Catalyst with Low Ruthenium Loading for Long-Term Acidic Oxygen Evolution

作     者：Yingying Wang Hui Pan Zhikun Liu Peng Kang 

作者机构：School of Chemical Engineering and Technology Tianjin University 

出 版 物：《Transactions of Tianjin University》 (天津大学学报(英文版))

年 卷 期：2024年第30卷第5期

页      面：395-405页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by National Nature Science Foundation of China (22379106) Carbon Energy Technology Co., Ltd. (0501001107) 

主　　题：Acidic media Heterostructure Long-term electrolysis Low precious metal Oxygen-evolution reaction Ru-based catalyst 

摘      要：We must urgently synthesize highly efficient and stable oxygen-evolution reaction（OER） catalysts for acidic media. Herein, we constructed a series of Ti mesh（TM）-supported RuO2/CoMoyOxcatalysts（RuO2/CoMoyOx/TM） with heterogeneous structures. By optimizing the ratio of Co to Mo, RuO2/CoMo2Ox/TM with low Ru loading（0.079 mg/cm2） achieves remarkable OER performance（ η = 243 mV at 10 mA/cm2） and high stability（300 h @ 10 mA/cm2） in 0.5 mol/L H 2 SO 4 electrolyte. The activity of RuO2/CoMoyOx/TM can be maintained for 50 h at 100 mA/cm2, and a water electrolyzer with RuO2/CoMo2Ox/TM as anode can operate for 40 h at 100 mA/cm2, suggesting the remarkable OER durability of RuO2/CoMoyOx/TM in acidic electrolyte. Owing to the heterogeneous interface between CoMo2Oxand RuO2, the electronic structure of Ru atoms was optimized and electron-rich Ru was formed. With modulated electronic properties, the dissociation energy of H2O is weakened, and the OER barrier is lowered. This study provides the design of low-cost noble metal catalysts with long-term stability in an acidic environment.