TY - JOUR
T1 - Sorption-determined deposition of Platinum on well-defined platelike WO3
AU - Wenderich, Kasper
AU - Klaassen, Aram Harold
AU - Sîretanu, Igor
AU - Mugele, Friedrich Gunther
AU - Mul, Guido
PY - 2014/7/23
Y1 - 2014/7/23
N2 - 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
AB - 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
KW - IR-92603
KW - METIS-303882
U2 - 10.1002/anie.201405274
DO - 10.1002/anie.201405274
M3 - Article
SN - 1433-7851
VL - 53
SP - 12476
EP - 12479
JO - Angewandte Chemie (international edition)
JF - Angewandte Chemie (international edition)
IS - 46
ER -