ChemCatChem
ChemCatChem
4 years ago

Platinum Supported on a Hybrid of Nickel and Tungsten Carbide on New-Diamond Electrocatalyst for Methanol Oxidation and Oxygen Reduction Reactions

Platinum Supported on a Hybrid of Nickel and Tungsten Carbide on New-Diamond Electrocatalyst for Methanol Oxidation and Oxygen Reduction Reactions
Yanhui Wang, Pengjuan Zhao, Jianbing Zang, Shaopei Jia, Weiping Wang, Yan Zhang, Liang Dong, Jing Su
A 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. Diamonds are forever: A hybrid of nickel and tungsten carbide on new-diamond (Ni-WC/nD) is synthesized by a microwave-assisted method. Pt nanoparticles are deposited on the hybrid to form the Pt/Ni-WC/nD electrocatalyst. Pt/Ni-WC/nD is an active electrocatalyst for the methanol oxidation reaction and the oxygen reduction reaction.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/cctc.201700866

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