A new method of direct synthesis of bimetallic phases: Silica supported PdCu catalysts from mixed acetylacetonates

✍ Scribed by A. Renouprez; K. Lebas; G. Bergeret

• Book ID: 104423322
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 777 KB
• Volume: 120
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(96)00437-2

✦ Synopsis

The direct synthesis on a silica support of well defined, crystalline, mixed Pd-Cu bis-acetylacetonates has been achieved and the structure of these new compounds was determined by powder X-ray diffraction. These clusters have been deposited on a silica support and their thermal decomposition under helium was followed by in situ X-ray diffraction, thertno-gravimetry and mass spectroscopy. Microcrystalline metallic alloys with a narrow distribution of composition and particle size in the 2-4 nm range are obtained. Infrared experiments of CO chemisorption confii the homogeneity of composition of the particles but conclude to a partial coverage of palladium by copper.