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Rational interface engineering of Cu2S–CoOx/CF enhances oxygen evolution reaction activity

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Abstract

Interface engineering is the most direct and efficient way to enhance the oxygen evolution reaction (OER) activity of transition-metal sulfides (TMSs). However, present methods of engineering nano-interfaces remain to be improved. Here, we present a nitrate-pyrolysis method to create a sulfide–oxide interface on Cu2S for the first time. Specifically, a CoOx decorated Cu2S nanowire array on Cu foam (Cu2S–CoOx/CF) is prepared successfully, and the XPS result demonstrates the interfacial connection between Cu2S and CoOx. To afford a current density of 25 mA cm−2, Cu2S–CoOx/CF needs an overpotential of 255 mV, lower than that of Cu2S/CF (354 mV) and CoOx/CC (378 mV). These results indicate that the introduction of the sulfide–oxide interface is an efficient means to enhance the OER activity of Cu2S. And this paper should provide a novel route for more explorations in interface engineering for TMSs.

Graphical abstract: Rational interface engineering of Cu2S–CoOx/CF enhances oxygen evolution reaction activity

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Article information


Submitted
17 Aug 2020
Accepted
05 Oct 2020
First published
06 Oct 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

Rational interface engineering of Cu2S–CoOx/CF enhances oxygen evolution reaction activity

X. Guan, X. Sun, H. Feng, J. Zhang, H. Wen, W. Tian, D. Zheng and Y. Yao, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC05585A

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