Abstract
In this paper, Pt nanoparticles were deposited on TiO2 nanocrystals with coexposed {101} and {001} facets by photodeposition and chemical reduction methods using H2PtCl6 or Pt(NH3)4Cl2 as precursors, respectively. The deposition method and Pt precursors exhibited great influence on the particle size, distribution, and chemical states of Pt nanoparticles, which further affected the recombination of photogenerated charges. The Pt/TiO2 catalyst prepared by chemical reduction of H2PtCl6 had the highest H2 and CH4 yield of 9.9 and 4.6μmolg−1h−1, resulting from the lowest recombination rate of photogenerated charges caused by the high Pt0/PtII ratio and homogeneous distribution of Pt nanoparticles over TiO2 facets.
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