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Issue 7, 2019
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Engineering Cu2O/Cu@CoO hierarchical nanospheres: synergetic effect of fast charge transfer cores and active shells for enhanced oxygen evolution reaction

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Abstract

A novel hollow core–shell Cu2O/Cu@CoO nanosphere composed of a Cu2O/Cu core and CoO shell was produced via a facile soft template method and a post-thermal annealing process. The formation of the Cu2O/Cu metal/semiconductor core structure played a key role in increasing the conductivity and facilitated the fast charge transfer process during the electrochemical reaction. Engineering the chemical coupling of the active CoO shell provided a large surface roughness to the benefit of abundant adsorbed active OH species for the OER. The synergetic effect of the fast charge transfer cores and active shells enhanced the OER. By adjusting the raw ratio of Cu/Co to 1/2, Cu2O/Cu@CoO exhibited the lowest overpotential of 330 mV at 10 mA·cm−2. This facile chemical method, which coupled CoO nanoparticles with Cu2O/Cu hollow spheres, could pave the way for controlling the fabrication of other core–shell binary transition metal oxide heterogeneous catalysts in electrochemical applications.

Graphical abstract: Engineering Cu2O/Cu@CoO hierarchical nanospheres: synergetic effect of fast charge transfer cores and active shells for enhanced oxygen evolution reaction

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Publication details

The article was received on 10 Apr 2019, accepted on 07 May 2019 and first published on 09 May 2019


Article type: Research Article
DOI: 10.1039/C9QI00400A
Inorg. Chem. Front., 2019,6, 1660-1666

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    Engineering Cu2O/Cu@CoO hierarchical nanospheres: synergetic effect of fast charge transfer cores and active shells for enhanced oxygen evolution reaction

    X. Zhong, Y. Zhang, Z. Geng, F. Shi, M. Jiang, Y. Sun, X. Wu, K. Huang and S. Feng, Inorg. Chem. Front., 2019, 6, 1660
    DOI: 10.1039/C9QI00400A

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