Size and Structure Matter: Enhanced CO<sub>2</sub> Photoreduction Efficiency by Size-Resolved Ultrafine Pt Nanoparticles on TiO<sub>2</sub> Single Crystals
journal contribution
posted on 2012-07-11, 00:00 authored by Wei-Ning Wang, Woo-Jin An, Balavinayagam Ramalingam, Somik Mukherjee, Dariusz
M. Niedzwiedzki, Shubhra Gangopadhyay, Pratim BiswasA facile development of highly efficient Pt-TiO<sub>2</sub> nanostructured
films via versatile gas-phase deposition methods is described. The
films have a unique one-dimensional (1D) structure of TiO<sub>2</sub> single crystals coated with ultrafine Pt nanoparticles (NPs, 0.5–2
nm) and exhibit extremely high CO<sub>2</sub> photoreduction efficiency
with selective formation of methane (the maximum CH<sub>4</sub> yield
of 1361 μmol/g-cat/h). The fast electron-transfer rate in TiO<sub>2</sub> 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<sub>2</sub> single crystals played an important role.
