A ternary composite catalyst of Pt-WO3-TiO2 has been successfully prepared by a chemical method. The prepared composite was systematically characterized by UV-vis diffuse reflectance absorption spectra (DRS), scanning electron inicroscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The electrocatalytic properties of Pt-WO3-TiO2 for methanoloxidation in an alkaline medium were evaluated by the cyclic voltammetry (CV) and chronoamperometry (CA) with or without visiblelightirradiation. Compared with the pure TiO2, the introduction of WO3 extends its absorption edge to visiblelight region. Undervisiblelight illumination, the Pt-WO3-TiO2 composite catalyst exhibits higher electrocatalytic activity toward methanoloxidation in comparison with its counterpart, the pure Pt-TiO2 catalyst.
Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China;Jiangxi Sci & Technol Normal Univ, Jiangxi Key Lab Organ Chem, Nanchang 330013, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China
Wang Caiqin,Jiang Fengxing,Zhou Rong,et al. Enhancement of methanol electrocatalytic oxidation on platinized WO3-TiO2 composite electrode under visible light irradiation[J]. MATERIALS RESEARCH BULLETIN,2013,48(3):1099-1104.