Electrodeposition preparation of Pt–HxWO3 composite and its catalytic activity toward oxygen reduction reaction

Platinum–hydrogen tungsten bronze (Pt–HxWO3) was prepared on glass carbon electrode by potentiostat in 0.1 mM H2PtCl6 + 4 mM Na2WO4 + 2 M H2SO4. Its surface morphology, structure and activity toward oxygen reduction reaction were studied with scan electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and linear sweeping voltammetry. It is found that platinum and hydrogen tungsten bronze can be co-deposited together on glassy carbon and the activity of platinum toward oxygen reduction can be improved significantly by HxWO3. Furthermore, the activity of Pt–HxWO3 toward oxygen reduction is hardly influenced by methanol.