氢气储存
吸附
镍
氢
材料科学
循环伏安法
电化学
无机化学
合金
电极
氢化物
金属
化学工程
化学
冶金
有机化学
物理化学
工程类
作者
Xueping Gao,Jian Liu,Shihai Ye,Deying Song,Nan Zhang
标识
DOI:10.1016/s0925-8388(96)03034-4
摘要
An improvement in the electrocatalytic activity of the hydrogen storage alloy electrodes is essential to ensure a high rate capability of an Ni–MH battery. Previous experimental results showed that there was a hydrogen adsorption phenomenon on the alloy surface and the activation energy barrier of the electrochemical reaction process should be reduced by hydrogen adsorption. Therefore, the hydrogen adsorption is of benefit in improving the electrocatalytic activity of the alloy electrode. In this work, the hydrogen adsorption performance on the surfaces of Zr(V0.2Mn0.2Ni0.6)2.4, MmNi3.6Mn0.4Co0.75Al0.25 alloy electrodes and carbonyl nickel electrode was measured by means of cyclic voltammetry. In addition, the hydrogen adsorption performance of the metal nickel ribbon was performed by electrochemical impedance spectra. The results showed that the Ni sites on the surface of the metal hydride electrodes play an important role in the hydrogen adsorption.
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