聚苯胺
催化作用
材料科学
介电谱
电化学
化学工程
极化(电化学)
活化能
电催化剂
金属
无机化学
化学
电极
冶金
复合材料
物理化学
聚合物
有机化学
工程类
聚合
作者
Alexis Damian,Sasha Omanovic
标识
DOI:10.1016/j.jpowsour.2005.09.007
摘要
Electrocatalytic activity of Ni and NiMo electrodeposited in a three-dimensional polyaniline (PANI) matrix was investigated in the hydrogen evolution reaction (HER). By using PANI an increase in surface roughness of the metallic catalytic layers could be obtained, ultimately yielding an increased overall electrocatalytic activity in the HER. It was demonstrated that alloying Ni with Mo results in an increased electrocatalytic activity in the HER when compared to pure Ni. This is due to an improved intrinsic activity of the material, which was explained on the basis of the modification of the electron density in the d-shell upon alloying Ni with Mo. An improvement of the NiMo/PANI catalysts’ intrinsic properties was also demonstrated by a significant decrease in activation energy in the HER when compared to the Ni/PANI layer. By using DC linear polarization and AC electrochemical impedance spectroscopy techniques the mechanism and kinetics of the HER on the investigated catalysts was determined.
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