Size and structure matter: Enhanced CO 2 photoreduction efficiency by size-resolved ultrafine Pt nanoparticles on TiO 2 single crystals

Wei Ning Wang, Woo Jin An, Balavinayagam Ramalingam, Somik Mukherjee, Dariusz M. Niedzwiedzki, Shubhra Gangopadhyay, Pratim Biswas

Research output: Contribution to journalArticlepeer-review

570 Scopus citations

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 μmol/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.

Original languageEnglish (US)
Pages (from-to)11276-11281
Number of pages6
JournalJournal of the American Chemical Society
Volume134
Issue number27
DOIs
StatePublished - Jul 11 2012
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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