A direct electrochemical route from oxides to TiMn_2 hydrogen storage alloy

作     者：朱靖 戴磊 于瑶 曹吉林 王岭 

作者机构：School of Chemical Engineering and TechnologyHebei University of Technology College of Chemical EngineeringHebei United University 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2015年第23卷第11期

页      面：1865-1870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）] 

基　　金：Supported by the National Natural Science Foundation of China(51201058) the Natural Science Foundation of Hebei Province(E2014209009) 

主　　题：Electro cleoxidationTiMnR alloyCaCl2 meltOxidesHydrogen storage 

摘      要：This study is for investigating the direct electro-deoxidation of mixed TiO2-Mn02 powder to prepare TiMn2 alloy in molten calcium chloride. The influences of process parameters, such as sintering temperature, cell voltage, and electrolysis time, on the electrolysis process were examined to investigate the mechanism of alloy formation. The composition and morphology of the products were analyzed by XRD and SEM, respectively. The electrochemical property of TiMn2 alloy was investigated by cyclic voltammetry measurements. The results show that pure TiMn2 can be prepared by direct electrochemical reduction of mixed TiO2/Mn02 pellets at a voltage of 3.1 V in molten calcium chloride of 900 ℃ for 7 h. The electro-deoxidation proceeds from the reduction of manganese oxides to Mn, which is reduced by Ti02 or CaTiOB to form TiMn2 alloy. The cyclic voltammetry measurements using pow- der microelectTode show that the prepared TiMn2 alloy has good electrochemical hydrogen storage property.