Issue 47, 2022

Hierarchical Ni–Mo–P nanoarrays toward efficient urea oxidation reaction

Abstract

The urea oxidation reaction (UOR), which possesses a low theoretical potential and superior kinetics, is an attractive substitute for the anodic oxygen evolution reaction (OER) in overall water splitting; however, the implementation of hydrogen production in overall urea splitting is impeded by the deficiency of highly efficient, durable and cost-effective catalysts. Herein, we fabricated an Ni2P–MoP2 heterostructure with a hierarchical structure grown on carbon paper (Ni–Mo–P/CP), which exhibited robust activity and outstanding durability for the electrocatalytic oxidation of urea. The Ni–Mo–P/CP catalyst possessed an ultralow potential of 1.39 V to obtain the current density of 100 mA cm−2, small Tafel slope (27 mV dec−1) and long-term durability with almost no decay within 15 h. The experimental characterization revealed that the optimized electronic structure and the synergistic effect of abundant exposed active sites in the Ni–Mo–P/CP catalyst contribute to the efficient UOR catalytic activity. This work enriches the candidate catalysts for the UOR and promotes the industrial development of hydrogen production.

Graphical abstract: Hierarchical Ni–Mo–P nanoarrays toward efficient urea oxidation reaction

Supplementary files

Article information

Article type
Paper
Submitted
13 Sep 2022
Accepted
31 Oct 2022
First published
01 Nov 2022

Dalton Trans., 2022,51, 18059-18067

Hierarchical Ni–Mo–P nanoarrays toward efficient urea oxidation reaction

J. Li, F. Hu, J. Hei, G. Liu, H. Wei, N. Wang and H. Wei, Dalton Trans., 2022, 51, 18059 DOI: 10.1039/D2DT02983A

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