EXCELLENT ELECTROCATALYSIS OF OXYGEN EVOLUTION USING Co(OH)x(WO4)y/MESOPOROUS CARBON NANOCOMPOSITES

Penghui Cao, Yuhua Yan, Xinli Tian, Ruizhuo Ouyang () and Yuqing Miao ()
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Penghui Cao: Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
Yuhua Yan: Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
Xinli Tian: Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
Ruizhuo Ouyang: Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
Yuqing Miao: Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 01, 1-7

Abstract: Oxygen evolution reaction (OER) is of great importance in splitting water. However, the sluggish OER kinetics at the anode severely hinders the H2 evolution at the cathode which is a crucial procedure for energy storage. Herein, we report the synthesis of a new OER catalyst of Co(OH)x(WO4)y via a one-step hydrothermal method, where the incorporation of WO42− as a condenser greatly enhanced the electrocatalytic activity of Co(OH)2 toward OER. Moreover, the introduction of mesoporous carbon (MC) further improves the electrocatalytic performance of Co(OH)x(WO4)y by forming the nanocomposites of Co(OH)x(WO4)y/MC. The synergism between Co(OH)2 and WO42− and the synergistic catalytic effect of Co(OH)x(WO4)y and MC majorly contributed to the apparently enhanced electrocatalysis of Co(OH)x(WO4)y/MC toward OER. This work provides an efficient strategy to improve the electrocatalytic activity of Co(OH)2 by introducing WO42− and forming nanocomposites between Co(OH)x(WO4)y and MC for low-cost, convenient and highly efficient water oxidation.

Keywords: Co(OH)x(WO4)y; mesoporous carbon; oxygen evolution; electrocatalysis (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X20500328

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