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Journal article

Size and structure matter: enhanced CO2 photoreduction efficiency by size-resolved ultrafine Pt nanoparticles on TiO2 single crystals

Wang W, An W, Ramalingam B, Mukherjee S, Niedzwiedzki D, Gangopadhyay S, Biswas P ...see all

Journal of American Chemical Society, vol. 134, issue 27 (2012) pp. 11276-11281

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Abstract

A facile development of highly efficient Pt-TiO(2) nanostructured films via versatile gas-phase deposition methods is described. The films have a unique one-dimensional (1D) structure of TiO(2) single crystals coated with ultrafine Pt nanoparticles (NPs, 0.5-2 nm) and exhibit extremely high CO(2) photoreduction efficiency with selective formation of methane (the maximum CH(4) yield of 1361 mumol/g-cat/h). The fast electron-transfer rate in TiO(2) single crystals and the efficient electron-hole separation by the Pt NPs were the main reasons attributable for the enhancement, where the size of the Pt NPs and the unique 1D structure of TiO(2) single crystals played an important role.

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Authors

  • W N Wang

  • W J An

  • B Ramalingam

  • S Mukherjee

  • D M Niedzwiedzki

  • S Gangopadhyay

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