Aged Co–Mo alloy thin film catalyst for hydrogen evolution reaction in acidic solution

KURU C.

Functional Materials Letters, vol.14, no.4, 2021 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 4
  • Publication Date: 2021
  • Doi Number: 10.1142/s1793604721510188
  • Journal Name: Functional Materials Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC, Metadex
  • Keywords: Catalyst, Co–Mo alloy, Hydrogen evolution reaction, Magnetron sputtering, Thin film
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

© World Scientific Publishing CompanyIn this study, aged Co–Mo (3:10) alloy film has been demonstrated as an efficient and durable catalyst for hydrogen evolution reaction (HER) in acidic solution. The Co–Mo alloy films with varying Co/Mo atomic ratios have been deposited by magnetron sputtering. The catalytic activity of Mo film is outperformed by the Co–Mo alloys, among which the Co–Mo (3:10) alloy exhibits the highest HER activity with an overpotential of 310 mV at 10 mA cm-2 current density, exchange current density of 1.74 × 10-4 A cm-2 and a Tafel slope of 61 mV dec-1. Combined with the good stability provided by the surface oxide layer, the aged Co–Mo (3:10) alloy is a promising catalyst for HER in acidic solutions.