کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675578 | 1454100 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electroless deposition of Au on Ag sol: Oxidation of carbon monoxide and methanol
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
Ag sols were synthesised by gamma-irradiation of AgNO3 solution in presence of 2-propanol as OH radical scavenger and PVP as steric stabiliser. Different dose rates were applied to control the size of Ag particles. Ag sol prepared was applied for reduction of AuCl4â resulting in the formation of Au-Ag and Au nanoparticles as confirmed by TEM and the red shift of the surface plasmon resonance of Ag. Au-Ag nanoparticles were fixed to Al2O3 (ICN alumina N). Following O2 treatment at 673Â K the Au-Ag/Al2O3 samples were tested in CO and methanol total oxidation. The increase of Ag activity at low Au concentrations can be attributed to small Au particles decorating Ag causing morphological and ligand effects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 269, Issues 1â3, 1 November 2005, Pages 67-71
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 269, Issues 1â3, 1 November 2005, Pages 67-71
نویسندگان
A. Sarkany,