SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (11): 1865-1870.DOI: 10.1016/j.cjche.2015.08.033

• 能源、资源与环境技术 • 上一篇    下一篇

A direct electrochemical route from oxides to TiMn2 hydrogen storage alloy

Jing Zhu1,2, Lei Dai2, Yao Yu2, Jilin Cao1, Ling Wang2   

  1. 1 School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
    2 College of Chemical Engineering, Hebei United University, Tangshan 063009, China
  • 收稿日期:2015-03-16 修回日期:2015-06-17 出版日期:2015-11-28 发布日期:2015-12-18
  • 通讯作者: Lei Dai, Ling Wang
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51201058) and the Natural Science Foundation of Hebei Province (E2014209009).

A direct electrochemical route from oxides to TiMn2 hydrogen storage alloy

Jing Zhu1,2, Lei Dai2, Yao Yu2, Jilin Cao1, Ling Wang2   

  1. 1 School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
    2 College of Chemical Engineering, Hebei United University, Tangshan 063009, China
  • Received:2015-03-16 Revised:2015-06-17 Online:2015-11-28 Published:2015-12-18
  • Contact: Lei Dai, Ling Wang
  • Supported by:

    Supported by the National Natural Science Foundation of China (51201058) and the Natural Science Foundation of Hebei Province (E2014209009).

摘要: This study is for investigating the direct electro-deoxidation ofmixed TiO2-MnO2 powder to prepare TiMn2 alloy in molten calciumchloride. The influences of process parameters, such as sintering temperature, cell voltage, and electrolysis time, on the electrolysis processwere examined to investigate themechanismof alloy formation. The composition and morphology of the products were analyzed by XRD and SEM, respectively. The electrochemical property of TiMn2 alloywas investigated by cyclic voltammetrymeasurements. The results showthat pure TiMn2 can be prepared by direct electrochemical reduction of mixed TiO2/MnO2 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 TiO2 or CaTiO3 to formTiMn2 alloy. The cyclic voltammetrymeasurements using powder microelectrode show that the prepared TiMn2 alloy has good electrochemical hydrogen storage property.

关键词: Electro-deoxidation, TiMn2 alloy, CaCl2 melt, Oxides, Hydrogen storage

Abstract: This study is for investigating the direct electro-deoxidation ofmixed TiO2-MnO2 powder to prepare TiMn2 alloy in molten calciumchloride. The influences of process parameters, such as sintering temperature, cell voltage, and electrolysis time, on the electrolysis processwere examined to investigate themechanismof alloy formation. The composition and morphology of the products were analyzed by XRD and SEM, respectively. The electrochemical property of TiMn2 alloywas investigated by cyclic voltammetrymeasurements. The results showthat pure TiMn2 can be prepared by direct electrochemical reduction of mixed TiO2/MnO2 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 TiO2 or CaTiO3 to formTiMn2 alloy. The cyclic voltammetrymeasurements using powder microelectrode show that the prepared TiMn2 alloy has good electrochemical hydrogen storage property.

Key words: Electro-deoxidation, TiMn2 alloy, CaCl2 melt, Oxides, Hydrogen storage