A new method to improve surface morphology of Ni-Fe-Mo-Co alloy electrode and its catalytic activity for HER

作     者：LUO Beiping REN Buye XU You ZHENG Yajie LUO Beiping1,2), REN Buye3), XU You1), and ZHENG Yajie2) 1) Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, China 2) College of Metallurgical Science and Engineering, Central South University, Changsha 410083, China 3) Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China

作者机构：Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang 414000 China College of Metallurgical Science and Engineering Central South University Changsha 410083 China Research Institute of Materials Science South China University of Technology Guangzhou 510640 China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2007年第26卷第3期

页      面：205-212页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：catalytic activity surface treatment Ni-Fe-Mo-Co alloy hydrogen evolution electrodeposition 

摘      要：A new pretreatment method has been developed to improve the catalytic activity of the Ni-Fe-Mo-Co alloy electrode for hydrogen evolution reaction （HER）. The procedure involves pre-electrolyzing the Ni-Fe-Mo-Co alloy electrode in 30% KOH solution containing 10% potassium sodium tartrate at 70℃ for 2 h, until some of the Mo and Fe elements are leached out. The surface morphology of the Ni-Fe-Mo-Co alloy demonstrates a unique hive-like structure after the pre- treatment, which has the pore size in a nanometer range （about 50 nm）, a very large real surface area, and good stability. The results of the electrochemical studies show that compared to other similar electrode materials and the treated Ni-Fe-Mo-Co electrode by leaching method, the pre-treated Ni-Fe-Mo-Co electrode has a much lower overpotential and much higher exchange current density for HER. In addition, a long-term continuous electrolysis test with a current interruption shows that the Ni-Fe-Mo-Co alloy has excellent catalytic stability.