Catalyst by chemical vapor deposition

Transihon metal carbonyls are easily soluble in organic solvents. For this reason, the impregnation method can be used in the preparation of catalysts. In some cases their properties allow the preparation of catalysts by chemical vapor deposition (CVD) on the support [11]. 

Serp et al. [39] prepared activated carbon-supported platinum catalysts by chemical vapor deposition of organometallic compounds. They contacted carbon rods with a gas mixture containing He, 3% H2, and a 10 molar ratio of [Pt(CH3)2(COD)] (COD ri" -l,5-cyclooctadiene) for 12 minutes at 383 K and 50 torr. They concluded that preoxidation of the carbon support with HNO3 was a very important factor in obtaining well-dispersed platinum particles, as the oxygen surface complexes acted as anchoring centers for the platinum precursor. 

X. W. Zhang and L. C. Lei, Development of Supported Boron-Doping Ti02 Catalysts by Chemical Vapor Deposition. J. Zhejiang Univ. Sci. A, 9,109-12 (2007). 

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