过电位
塔菲尔方程
无定形固体
结晶度
非晶态金属
材料科学
类金属
化学工程
电催化剂
催化作用
冶金
无机化学
电极
化学
电化学
金属
合金
结晶学
复合材料
有机化学
物理化学
工程类
作者
Keryn Lian,Donald W. Kirk,Steven J. Thorpe
标识
DOI:10.1016/0013-4686(91)85138-w
摘要
Amorphous metals may be important electrode materials for use in alkaline fuel cells and electrolyser applications. The electrocatalytic activity of amorphous and crystalline Ni-base alloys with respect to the Hydrogen Evolution Reaction (HER) has been studied in the present work. The Tafel parameters have been measured, and the effect of Ni/Co ratio, metalloids and crystallinity on the catalytic activity of both amorphous and crystalline alloys has been examined and compared. The amorphous alloys exhibit lower activities than that of their crystalline counterparts in the as-polished state. However, an enhanced electrocatalytic activity was observed on amorphous alloys after chemical treatments, which was not found on crystalline alloys after similar chemical treatments. Amorphous alloys are more electrocatalytically active than crystalline alloys after chemical treatment, especially in the high overpotential regime.
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