Ru@RuO2 Core-Shell Nanorods: A Highly Active and Stable Bifunctional Catalyst for Oxygen Evolution and Hydrogen Evolution Reactions

作     者：Rongzhong Jiang Dat T.Tran Jiangtian Li Deryn Chu Rongzhong Jiang;T.Tran;Jiangtian Li;Deryn Chu

作者机构：Sensors and Electron Devices DirectorateU.S.Army Research Laboratory2800 Powder Mill RoadAdelphiMD 20783-1197USA 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2019年第2卷第3期

页      面：201-208页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0808[工学-电气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0706[理学-大气科学] 0702[理学-物理学] 

基　　金：the U.S.Department of the Army U.S.Army Materiel Command for supporting this work 

主　　题：bifunctional catalyst core-shell hydrogen evolution reaction oxygen evolution reaction Ru@RuO2 

摘      要：Ru@RuO2 core-shell nanorods were successfully synthesized by heat-treating Ru nanorods with air oxidation through an accurate control of the temperature and time. The structure, composition, dimension, and adsorption property of the core-shell nanorods were well characterized with XRD and TEM. The catalytic activity and stability were electrochemically evaluated with a rotating disk electrode, a rotating ring-disk electrode, and chronopotentiometric methods. The Ru@RuO2 nanorods reveal excellent bifunctional catalytic activity and robust stability for both oxygen evolution reaction(OER) and hydrogen evolution reaction(HER). The overpotentials for OER and HER are 320 m V and 137 m V at the current density of10 m A cm-2, respectively. The catalytic activity of Ru@RuO2 nanorods for OER is 6.5 times higher than that of the state-of-the-art catalyst IrO2 according to the catalytic current density measured at 1.60 V(versus RHE).The catalytic activity of Ru@RuO2 nanorods for HER is comparable to 40%Pt/C by comparing the catalytic current densities at à0.2 V.