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Mössbauer spectroscopic characterisation of catalysts obtained by interaction between tetra-n-butyl-tin and silica or silica supported rhodium |
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| Authors: | JMM Millet J Toyir B Didillon JP Candy C Nédez JM Basset |
| Institution: | 1. Institut de Recherches sur la Catalyse, CNRS, conventionné avec l'Université Claude-Bernard, Lyon I, 2 Av. A. Einstein, F-69626, Villeurbanne, France 2. Laboratoire de Chimie Organométallique de Surface, UMR CPE-CNRS 9986, 43 Bd du 11 Nov.1918, F-69100, Villeurbanne, France 3. Institut Fran?ais du Pétrole, 1&4 Av. de Bois-Préau, F-92506, Rueil Malmaison Cédex, France |
| Abstract: | Mössbauer spectroscopy at 78 K was used to study the interaction between tetra-n-butyl-tin and the surfaces of silica or silica supported rhodium. At room temperature, the tetra-n-butyl-tin was physically adsorbed on the surfaces. After reaction under hydrogen at 373 K, the formation of grafted organometallic fragments on the Rh surface was confirmed whereas with pure silica, ≡SiO-Sn(n-C4H9)3 moieties were observed. After treatment at 523 K, the rhodium grafted organometallic species was completely decomposed and there was formation of a defined bimetallic RhSn compound. |
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