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 Wang L, Liu Z, Zhu S, Shao M, Yang B, Chen JG. Tungsten Carbide and Cobalt Modified Nickel Nanoparticles Supported on MWCNTs as Highly Efficient Electrocatalysts for Urea Oxidation in Alkaline Electrolyte. ACS Appl Mater Interfaces. 2018.