Three-dimensional hierarchical Co(OH)F nanosheet arrays decorated by single-atom Ru for boosting oxygen evolution reaction

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

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Author(s)

  • Shizheng Zhou
  • Haeseong Jang
  • Qing Qin
  • Min Gyu Kim
  • Chuang Li
  • Xien Liu
  • Jaephil Cho

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)1408-1417
Journal / PublicationScience China Materials
Volume64
Issue number6
Online published28 Dec 2020
Publication statusPublished - Jun 2021

Abstract

Electronic coupling with the support plays a crucial role in boosting the intrinsic catalytic activity of a single-atom catalyst. Herein, the three-dimensional (3D) hierarchical Co(OH)F nanosheet arrays modified by singleatom Ru (SA-Ru/Co(OH)F) are prepared by a facile one-step hydrothermal method under mild conditions, which exhibit excellent activity with an overpotential of 200 and 326 mV at 10 and 500 mA cm−2, respectively, as well as robust stability for oxygen evolution reaction (OER) in 1.0 mol L−1 KOH electrolyte. The study of electronic structures and surface chemical states before and after OER testing reveals that the strong electronic coupling between single-atom Ru and Co(OH)F induces the charge redistribution in SA-Ru/Co(OH)F and suppresses the excessive oxidation of Ru into higher valence state (more than +4) under high OER potential. This work provides a strategy to stabilize single-atom Ru by Co(OH)F that can enhance the activity and durability for OER under large current densities.

Research Area(s)

  • electrocatalyst, electronic coupling, oxygen evolution reaction, ruthenium, single atom

Citation Format(s)

Three-dimensional hierarchical Co(OH)F nanosheet arrays decorated by single-atom Ru for boosting oxygen evolution reaction. / Zhou, Shizheng; Jang, Haeseong; Qin, Qing; Li, Zijian; Kim, Min Gyu; Li, Chuang; Liu, Xien; Cho, Jaephil.

In: Science China Materials, Vol. 64, No. 6, 06.2021, p. 1408-1417.

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