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Facile Synthesis of Hierarchical Porous NixCo1-xSeO3 Networks with Controllable Composition as a New and Efficient Water Oxidation Catalyst

Abstract

Electrocatalysts are of significant importance for hydrogen production via water splitting. To replace noble meta based electrocatalysts, exploring new counterparts is critical for their large-scale and widespread deployment. In this paper, we report the synthesis of nickel-cobalt selenite (Ni0.5Co0.5SeO3) networks on a nickel foam with promising electrocatalytic performance through a facile electrodeposition method. The networked structure built with interconnected nanosheets along with the three-dimensional backbone of nickel foam is able to provide large surface area for the reaction to take place and simultaneously offer the connected channels for charge carriers to pass through, consequently, realizing the enhancement of oxygen evolution reaction (OER) electrocatalytic activity. Importantly, the hierarchical channel structure affords vast spaces to buffer the volume change during repeated redox reactions and offers feasible channels for gas release, leading to the good electrochemical stability. The best sample with optimized composition shows superior catalytic activity with high current density of 243.6 mA cm-2 at the overpotential of 500 mV and excellent stability.

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Publication details

The article was received on 15 Nov 2018, accepted on 10 Jan 2019 and first published on 11 Jan 2019


Article type: Paper
DOI: 10.1039/C8NR09218D
Citation: Nanoscale, 2019, Accepted Manuscript
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    Facile Synthesis of Hierarchical Porous NixCo1-xSeO3 Networks with Controllable Composition as a New and Efficient Water Oxidation Catalyst

    J. Xin, H. Tan, Z. Liu, L. Zhao, J. Xie, Y. Sang, W. Zhou, A. Wang, J. Wang and H. Liu, Nanoscale, 2019, Accepted Manuscript , DOI: 10.1039/C8NR09218D

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