Abstract
AbstractA hybrid of nickel and tungsten carbide on new‐diamond (Ni‐WC/nD) was synthesized by a microwave‐assisted method, in which nickel(tungsten) hydroxide was deposited on carbon black and then reduced carbothermally under N2 atmosphere. Pt nanoparticles (NPs) were deposited on the hybrid to form the Pt/Ni‐WC/nD electrocatalyst. XRD and TEM were used to investigate the structure and morphology of Pt/Ni‐WC/nD, respectively. The results revealed that Ni and WC particles formed on carbon black during the reduction of nickel(tungsten) hydroxide at 1300 °C under N2, and the amorphous carbon was translated to new‐diamond as a result of the catalysis of Ni. The Pt NPs deposited on Ni‐WC/nD exhibited a good affinity with the support. We demonstrated that Pt/Ni‐WC/nD was an active electrocatalyst for the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR). Pt/Ni‐WC/nD exhibited a better electrocatalytic activity and durability than Pt/C electrocatalyst for the MOR and ORR. This can be attributed to the strong interaction between the Ni‐WC/nD support and Pt and the excellent stability of the new‐diamond.
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