XAFS study on a photodeposition process of Pt nanoparticles on TiO2 photocatalyst. (May 2016)

• Record Type: Journal Article
• Authors: Yoshida, T.; Minoura, Y.; Nakano, Y.; Yamamoto, M.; Yagi, S.; Yoshida, H.
• Is Part Of: Journal of physics. Volume 712(2016)
• Publication Date: 2016-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/712/1/012076
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: A photodeposition process of Pt metal particles on anatase TiO2 in the aqueous solution of H2 PtCl6 (precursor) and methanol (reductant) was studied using transmission electron microscopy, UV-vis spectroscopy and X-ray absorption fine structure spectroscopy. These analyses proposed the photodeposition mechanism of Pt on TiO2 by the photogenerated electrons: the photo-assisted adsorption of Pt 4+ complexes on TiO2 through the ligand exchange at the initial stage, followed by the successive rapid reduction of Pt 4+ to Pt 0 to grow the Pt metal particles, which gives small and almost uniform size of Pt metal nanoparticles.