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Ultrathin Amorphous Cobalt-Vanadium Hydr(oxy)oxide Catalysts for Oxygen Evolution Reaction

Abstract

Cost efficient and long-time stable catalysts are in great demand for oxygen evolution reaction (OER), a key process involved in water splitting cells and metal–air batteries. Here we demonstrate that the ultrathin amorphous cobalt-vanadium hydr(oxy)oxide we synthesized is a highly promising electrocatalytic material for OER with a low overpotential of 0.250 V (even lower down to 0.215 V when supported on Au foam) at 10 mA cm-2 and a long stable operation time (170 h) in alkaline media. In combination with in-situ X-ray absorption spectral characterization and first-principles simulations, we reveal that the ultrathin, amorphous and alloyed structural characteristics have enabled its facile transformation to the desirable active phase, leading to a dramatically enhanced catalytic activity. Our finding highlights the remarkable advantages of the two-dimensional amorphous material and sheds new light on the design of high-performance electrocatalyts.

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Publication details

The article was received on 26 Feb 2018, accepted on 13 Apr 2018 and first published on 13 Apr 2018


Article type: Communication
DOI: 10.1039/C8EE00611C
Citation: Energy Environ. Sci., 2018, Accepted Manuscript
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    Ultrathin Amorphous Cobalt-Vanadium Hydr(oxy)oxide Catalysts for Oxygen Evolution Reaction

    J. Liu, Y. Ji, J. Nai, X. Niu, Y. Luo, L. Guo and S. Yang, Energy Environ. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8EE00611C

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