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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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

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Title
Three-dimensional hierarchical Co(OH)F nanosheet arrays decorated by single-atom Ru for boosting oxygen evolution reaction
Author
Zhou, ShizhengJang, HaeseongQin, QingLi, ZijianKim, Min GyuLi, ChuangLiu, XienCho, Jaephil
Issue Date
2021-06
Publisher
SCIENCE PRESS
Citation
SCIENCE CHINA-MATERIALS, v.64, no.6, pp.1408 - 1417
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/52900
URL
https://link.springer.com/article/10.1007/s40843-020-1536-6
DOI
10.1007/s40843-020-1536-6
ISSN
2095-8226
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ECHE_Journal Papers
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