Preparation of the WO<inf>3</inf>/TiO<inf>2</inf> using microwave-heating in ionic liquid and its application in electrocatalysis

Abstract

A high dispersed WO<sub>3</sub>/TiO<sub>2</sub> particles were prepared by using a microwave heating assisted ionic liquid method. The phase structure and morphology of WO<sub>3</sub>/TiO<sub>2</sub> particles were characterized by X-ray diffraction and scanning electron microscopy. The result shows that fluffy WO<sub>3</sub> balls were assembled on TiO<sub>2</sub> and the surface structure of WO<sub>3</sub>/TiO<sub>2</sub> particle was comprised of numbers of shuttle-like nanoneedles. The different WO<sub>3</sub>/TiO<sub>2</sub> particles were obtained by simply changing the concentration of the ionic liquid. Then PtWO<sub>3</sub>/TiO<sub>2</sub> catalysts were prepared and its electro-catalytic performances were evaluated by cyclic voltammetry and the CO stripping test. The results revealed that PtWO<sub>3</sub>/TiO<sub>2</sub>-1.5 catalyst had the better performance for methanol oxidation and CO tolerance which proved that the ionic liquid in this reaction system provided the multiple functions for preparing a promising catalyst for methanol oxidation.

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