Issue 31, 2020

Multi-shelled cobalt–nickel oxide/phosphide hollow spheres for an efficient oxygen evolution reaction

Abstract

Because of their low cost and Earth-abundant characteristics, materials based on 3d transition metals have attracted great research interest and are considered as promising electrocatalysts for the oxygen evolution reaction (OER), besides the commercial noble metal-based materials, in recent years. In order to improve electrocatalytic activity, it is necessary to design the structures and compositions of electrocatalysts. In this study, a series of multi-shelled CoxNi1−x oxide/phosphide hollow spheres with tunable element ratios were prepared. The electrocatalytic activity of the multi-shelled CoxNi1−x oxide/phosphide is strongly dependent on the molar ratio of Co and Ni. Based on the combined advantages of complex structures and compositions, the multi-shelled Co0.5Ni0.5 oxide/phosphide displays outstanding electrocatalytic performance in terms of high activity and stable durability for the OER, surpassing those of RuO2 and multi-shelled CoxNi1−x oxide/phosphide with other element ratios of Co and Ni. This result suggests a great possibility of rationally designing the composition for highly efficient electrocatalysts.

Graphical abstract: Multi-shelled cobalt–nickel oxide/phosphide hollow spheres for an efficient oxygen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
26 Apr. 2020
Accepted
10 Jūl. 2020
First published
10 Jūl. 2020

Dalton Trans., 2020,49, 10918-10927

Multi-shelled cobalt–nickel oxide/phosphide hollow spheres for an efficient oxygen evolution reaction

Y. Yang, H. Wan, G. Chen, N. Zhang, J. Li, W. Ma, X. Liu and R. Ma, Dalton Trans., 2020, 49, 10918 DOI: 10.1039/D0DT01523G

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