Enhancement of methanol electrocatalytic oxidation on platinized WO{sub 3}–TiO{sub 2} composite electrode under visible light irradiation

Journal Article · Fri Mar 15 04:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.11.112· OSTI ID:22290383

Wang, Caiqin ^[1]; Jiang, Fengxing ^[1]; Zhou, Rong ^[1]; Du, Yukou ^[1]; Yang, Ping ^[1]; Wang, Chuanyi ^[2]; Xu, Jingkun ^[3]

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1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)
2. Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011 (China)
3. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013 (China)

Highlights: ► A ternary composite catalyst of Pt–WO{sub 3}–TiO{sub 2} has been synthesized. ► The introduction of WO{sub 3} extends its absorption edge to visible light region. ► The electrode displays high electrocatalytic activity. ► With visible light irradiation, its electrocatalytic activity increases 70%. - Abstract: A ternary composite catalyst of Pt–WO{sub 3}–TiO{sub 2} has been successfully prepared by a chemical method. The prepared composite was systematically characterized by UV–vis diffuse reflectance absorption spectra (DRS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The electrocatalytic properties of Pt–WO{sub 3}–TiO{sub 2} for methanol oxidation in an alkaline medium were evaluated by the cyclic voltammetry (CV) and chronoamperometry (CA) with or without visible light irradiation. Compared with the pure TiO{sub 2}, the introduction of WO{sub 3} extends its absorption edge to visible light region. Under visible light illumination, the Pt–WO{sub 3}–TiO{sub 2} composite catalyst exhibits higher electrocatalytic activity toward methanol oxidation in comparison with its counterpart, the pure Pt–TiO{sub 2} catalyst.

• OSTI ID: 22290383
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 3 Vol. 48; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMPEROMETRY
CATALYSTS
METHANOL
OXIDATION
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTATES
TUNGSTEN OXIDES
VISIBLE RADIATION
VOLTAMETRY