One-step synthesis of mesoporous Cobalt sulfides (CoSx) on the metal substrate as an efficient bifunctional electrode for overall water splitting

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Haidong Bian
  • Tongyuan Chen
  • Zhixuan Chen
  • Binbin Zhou
  • Xierong Zeng
  • Jiaoning Tang
  • Chen Liu

Detail(s)

Original languageEnglish
Article number138786
Journal / PublicationElectrochimica Acta
Volume389
Online published17 Jun 2021
Publication statusPublished - 1 Sep 2021

Abstract

Electrocatalysts based on transition metal sulfides (TMSs) are drawing accelerating concerns in renewable energy research because of their intrinsically excellent activities towards both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). To date, considerable efforts are made to improve the performance of these catalysts, but ignoring the improper synthesis strategy would incur additional cost to the catalyst. Herein, a convenient, one-step anodization method is developed for fast construction of cobalt sulfides (CoSx). Without any high-temperature or long-time treatment, mesoporous CoSx is self-grown on the metal substrate in minutes. As a result, as-anodic CoSx requires overpotentials of 102 mV for HER and 284 mV for OER to achieve a current density of 10 mA m−2 in alkaline solution. Moreover, the tandem bifunctional as-anodic CoSx exhibits a required cell voltage of 1.64 V for overall water splitting in alkaline solution, exceeding most of the documented Co-based electrocatalysts.

Research Area(s)

  • Anodization, Cobalt sulfides, Electrocatalysts, HER, OER, Overall water splitting

Citation Format(s)

One-step synthesis of mesoporous Cobalt sulfides (CoSx) on the metal substrate as an efficient bifunctional electrode for overall water splitting. / Bian, Haidong; Chen, Tongyuan; Chen, Zhixuan; Liu, Jiahua; Li, Zebiao; Du, Peng; Zhou, Binbin; Zeng, Xierong; Tang, Jiaoning; Liu, Chen.

In: Electrochimica Acta, Vol. 389, 138786, 01.09.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review