Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (06): 1417-1423.doi: 10.3866/PKU.WHXB20110510

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Electrocatalytic Performance of Ni-Mo/LaNi5 Porous Composite Electrode toward Hydrogen Evolution Reaction

WANG Sen-Lin, ZHANG Yi   

  1. Department of Applied Chemistry, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, Fujian Province, P. R. China
  • Received:2010-12-06 Revised:2011-01-23 Published:2011-05-31
  • Contact: WANG Sen-Lin E-mail:slwang@hqu.edu.cn

Abstract:

A Ni-Mo/LaNi5 porous composite electrode was successfully prepared by composite electrodeposition and dissolution with a concentrated alkali solution. We found that the electrode consisted of two phases and a porous structure using scanning electron microscopy (SEM) and X-ray diffraction (XRD). In a 20% (w) NaOH solution the electrocatalytic properties toward hydrogen evolution reaction (HER) of the electrode was evaluated using electrochemical steady-state polarization curve and electrochemical impendence spectroscopy (EIS). As a result, the porous composite electrode had good electrocatalytic activity toward HER. We also found that the control step in the HER was the electrochemical de-absorption of hydrogen. The stability of the porous composite electrode was investigated by cycle voltammetry, discontinuity constant potential electrolysis over a long time, and differential scanning calorimetry (DSC). The results show that the stability of the porous composite electrode is good.

Key words: Ni-Mo/LaNi5, Porous composite electrode, Composite electrodeposition, Hydrogen evolution reaction, Stability

MSC2000: 

  • O646