Pd nanoparticles on mesoporous tungsten carbide as a non-Pt electrocatalyst for methanol electrooxidation reaction in alkaline solution

초록

We demonstrate Pd nanoparticles on well-defined mesoporous tungsten carbide (Pd/meso-WC) for methanol electrooxidation in alkaline solution. The meso-WC exhibits mesoporous structure with similar to 8.5 nm in average pore size and similar to 47 m(2) g(-1) in specific surface area. The Pd nanoparticles with size of similar to 3.3 nm are highly dispersed on the meso-WC. The electron transfer from W to Pd due to the difference of electronegativity is confirmed by Xray photoelectron spectroscopy. The improved electrocatalytic activity and stability for methanol electrooxidation of Pd/meso-WC is likely to be mainly attributed to a strong interaction between Pd nanoparticles and mesoporous tungsten carbide structure. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

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