Sorption-determined deposition of Platinum on well-defined platelike WO3

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Abstract

The photodeposition of Pt nanoparticles from [PtCl6]2− on platelike WO3 crystals occurs preferentially on the small, subordinate facets. Rather than the often-used explanation of preferred light-induced charge migration, we propose that this phenomenon is due to differences in the intrinsic surface charges of WO3 facets exposed to water; thus, the dark sorption of [PtCl6]2− on positively charged facets/edges is preferred. This conclusion is based on 1) (dark) impregnation studies, which showed Pt deposition to also be facet-specific, and 2) aqueous-phase AFM studies, which suggest intrinsic surface charges to be in agreement with sorption-based Pt distributions
Original languageEnglish
Pages (from-to)12476-12479
JournalAngewandte Chemie (international edition)
Volume53
Issue number46
DOIs
Publication statusPublished - 23 Jul 2014

Keywords

  • IR-92603
  • METIS-303882

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