Electrocatalytic behaviour of Ni-base amorphous alloys

✍ Scribed by K. Lian; D.W. Kirk; S.J. Thorpe

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 848 KB
• Volume: 36
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(91)85138-w

✦ Synopsis

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 .