Electrodeposited Amorphous Tungsten-doped Cobalt Oxide as an Efficient Catalyst for the Oxygen Evolution Reaction

Linh N. Nguyen, Ung Thi Dieu Thuy, Quang Duc Truong, Itaru Honma, Quang Liem Nguyen, Phong D. Tran

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Thin film of amorphous tungsten-doped cobalt oxide (W:CoO) was successfully grown on a conducting electrode via an electrochemical oxidation process employing a [Co(WS4)2]2− deposition bath. The W:CoO catalyst displays an attractive performance for the oxygen evolution reaction in an alkaline solution. In an NaOH solution of pH 13, W:CoO operates with a moderate onset overpotential of 230 mV and requires 320 mV overpotential to generate a catalytic current density of 10 mA cm−2. A low Tafel slope of 45 mV decade−1 was determined, indicating a rapid O2-evolving kinetics. The as-prepared W:CoO belongs to the best cobalt oxide-based catalysts ever reported for the oxygen evolution (OER) reaction.

Original languageEnglish
Pages (from-to)1530-1534
Number of pages5
JournalChemistry - An Asian Journal
Volume13
Issue number12
DOIs
Publication statusPublished - 2018 Jun 18

Keywords

  • catalyst activation
  • cobalt oxide
  • electrocatalysis
  • solar water splitting
  • tetrathiotungstate

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry

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