Oxidation of hydrogen by metal complexes of platinum and palladium immobilized on silica

The thermal stability of metal complexes immobilized on the surface of sili ca and its connection with the catalytic activity in the oxidation of hydro gen were investigated. High catalytic activity was exhibited by heterogeniz ed platinum and palladium acetylacetonate near room temperatures in the ini tial state and by gamma -aminopropylsilicas treated with platinum and palla dium complexes. The catalytic activity of the metal complexes correlates wi th their thermal stability and with the ability to undergo oxidation to a m etal state with high valence.