International Journal of Hydrogen Energy, Vol.44, No.36, 19595-19602, 2019
Synthesis of CoMoO4/Co9S8 network arrays on nickel foam as efficient urea oxidation and hydrogen evolution catalyst
It is of high significance to design robust, low-cost and stable electrocatalysts for the urea splitting reaction under alkaline medium. In this communication, we present the exploitation of CoMoO4/Co9S8 which directly grown on nickel foam (CoMoO4/Co9S8/NF) as a robust and stable electrocatalyst for urea splitting. Such CoMoO4/Co9S8/NF (C-Mo:C-S = 9:1) presents the lowest overpotential (172 mV@10 mAcm(-2)), which is better than that of CoMoO4/NF (185 mV 10 mAcm(-2)), CoMoO4/Co9S8/NF (C-Mo:C-S = 8:2) (208 mV 10 mAcm(-2)), CoMoO4/Co9S8/NF (C-Mo:C-S = 7:3) (270 mv 10 mAcm(-2)) and Co9S8/NF (286 mV010 mAcm(-2)) for hydrogen evolution. In addition, The CoMoO4/Co9S8/NF (C-Mo:C-S = 8:2) presents a superior long-term electrocatalytic stability, keeping its activity at 40 mAcm(-2) for 13 h for urea oxidation. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.