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 journal › peer-review
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Detail(s)
Original language | English |
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Pages (from-to) | 1408-1417 |
Journal / Publication | Science China Materials |
Volume | 64 |
Issue number | 6 |
Online published | 28 Dec 2020 |
Publication status | Published - Jun 2021 |
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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 et al.
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 journal › peer-review