COLL 175 |
| Catherine Louis, Laboratoire de Réactivité de Surface, UMR 7609-CNRS, Laboratoire de Réactivité de Surface, UMR 7609-CNRS, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France |
| This presentation aims at showing that silica used as catalyst support, may not only play the role of support, but can react with metal complexes to form silicates: - in solution during catalyst preparation, i.e., at the solid-liquid interface, through a mechanism of silica dissolution and reprecipitation as a silicate. Examples of several systems, Ni/SiO2, Cu/SiO2, Co/SiO2 prepared by the procedure of cation adsorption, will be presented. The parameters responsible for this phenomenon will be identified; - during thermal treatments, even at moderate temperature, after deposition of the precursors on the silica support. The case of Zn/SiO2 will be addressed. |
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The Science and Engineering of Catalyst Preparation
2:00 PM-5:25 PM, Monday, March 29, 2004 Marriott -- Orange County 3, Oral
Division of Colloid and Surface Chemistry |