Tungsten Carbide and Cobalt Modified Nickel Nanoparticles Supported on MWCNTs as Highly Efficient Electrocatalysts for Urea Oxidation in Alkaline Electrolyte.

Author(s) Wang, L.; Liu, Z.; Zhu, S.; Shao, M.; Yang, B.; Chen, J.G.
Journal ACS Appl Mater Interfaces
Date Published 2018 Nov 06
Abstract

The tungsten carbide and cobalt modified Ni-based catalyst (Ni-Co-WC/MWCNTs), synthesized through a sequential impregnation method, was evaluated for the urea electrooxidation in alkaline electrolyte to reduce the overpotential and increase the current density simultaneously. The as-prepared Ni-Co-WC/MWCNTs catalyst was characterized using SEM-EDX, TEM, XRD and XPS. Characterization results indicate that Ni, Co and WC nanoparticles are uniformly distributed on the MWCNTs. For the Ni-Co-WC/MWCNTs electrode, the maximum current density for urea electrooxidation is more than 4 times higher than that of the Ni/C catalyst, with a reduction of 120 mV in the onset overpotential. In addition, the Ni-Co-WC/MWCNTs catalyst also shows an enhanced catalytic stability with a continuous higher current density under steady-state conditions.

DOI 10.1021/acsami.8b14397
ISSN 1944-8252
Citation ACS Appl Mater Interfaces. 2018.

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