A Crucial Step to Platinum Nanocrystals with Special Surfaces: Control of Aquo/Chloro Ligand Exchange in Aqueous PtCl62- Solution
作者： Ying-Tao Yu , Jing Wang , Jun-Hai Zhang , Hai-Jun Yang , Bo-Qing Xu
DOI: 10.1021/JP071216R
关键词:
摘要: Platinum (Pt) nanocrystals with special surfaces attract much attention in the field of chemistry because surface structure plays a vital role for activity and selectivity Pt catalyst. The evolution is closely related facet growth, which depends on not only oxidizing property precursor but also competitiveness adsorption nanocrystal surface. Besides precursor/protector ratio, charge influences its competitive since metal smaller than 10 nm have strong tendency to keep electroneutrality. By using blue or violet light, control aquo/chloro ligand exchange PtCl62- attempted 1.5 × 10-4 mol·dm-3 K2PtCl6 aqueous solution at room temperature. First derivative spectra UV absorption, X-ray photoelectron (XPS), 195Pt nuclear magnetic resonance (NMR) reveal that between H2O dominant; hyd...
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