Photocatalytic oxidation of small molecule hydrocarbons over Pt/TiO 2 nanocatalysts

Highly active Pt/TiO 2 catalysts were prepared by a simple photo-reduction method and used for catalytic oxidation of alkanes (C 2 H 6 and C 3 H 8 ) and alkenes (C 2 H 4 and C 3 H 6 ). It was found that significantly improved photo-activity can be reached even by loading a very small amount of Pt (0...

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Bibliographic Details
Published in:RSC advances 2016, Vol.6 (4), p.2760-2767
Main Authors: Li, Yunpeng, Cai, Yuanzhu, Chen, Xuxing, Pan, Xiaoyang, Yang, Mingxue, Yi, Zhiguo
Format: Article
Language:English
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Summary:Highly active Pt/TiO 2 catalysts were prepared by a simple photo-reduction method and used for catalytic oxidation of alkanes (C 2 H 6 and C 3 H 8 ) and alkenes (C 2 H 4 and C 3 H 6 ). It was found that significantly improved photo-activity can be reached even by loading a very small amount of Pt (0.2–0.5 wt%). Moreover, the Pt loading resulted in unexpected visible light activity for the oxidation of small molecule hydrocarbons. Further investigation using photoluminescence spectra indicate that the Pt loading helps reduce the charge carrier recombination within the TiO 2 nanoparticles. Electron Paramagnetic Resonance (EPR) spectra reveal both oxygen molecules and lattice oxygen participate in the hydrocarbons' photooxidation. The transfer and reaction mechanisms of charge carriers during the photo-oxidation process are discussed in detail.
ISSN:2046-2069
2046-2069
DOI:10.1039/C5RA22459D