Electrodeposited Amorphous Tungsten‐doped Cobalt Oxide as an Efficient Catalyst for the Oxygen Evolution Reaction. Issue 12 (29th May 2018)

• Record Type: Journal Article
• Authors: Nguyen, Linh N.; Thuy, Ung Thi Dieu; Truong, Quang Duc; Honma, Itaru; Nguyen, Quang Liem; Tran, Phong D.
• Is Part Of: Chemistry, an Asian journal. Volume 13:Issue 12(2018)
• Page Start: 1530
• Page End: 1534
• Publication Date: 2018-05-29
• Subjects: catalyst activation -- cobalt oxide -- electrocatalysis -- solar water splitting -- tetrathiotungstate; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201800401
• Languages: English
• ISSNs: 1861-4728

Abstract

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. Abstract : Smooth operator : Amorphous tungsten‐doped cobalt oxide catalyst is shown to operate at a low overpotential, to generate a high catalytic rate and to display attractive robustness in an alkaline electrolyte.