| Autor: | Feng-Xian Liu, G. Herve, Nathalie Laronze, Jean-François Moisan, Catherine Roch-Marchal |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Inorganic chemistry
chemistry.chemical_element Nanochemistry General Chemistry Condensed Matter Physics Biochemistry Toluene Copper Catalysis Isobutyric acid Metal chemistry.chemical_compound chemistry Transition metal visual_art visual_art.visual_art_medium General Materials Science Dehydrogenation |
| Zdroj: | Journal of Cluster Science. 13:355-368 |
| ISSN: | 1040-7278 |
| DOI: | 10.1023/a:1020598932007 |
| Popis: | Transition metal salts of heteropolyacids have been prepared taking into account the strong acidic and cation exchanging properties of the solid heteropolyacids. The exchange between protons and the transition metal cation is carried out by stirring a suspension of the hydrated heteropolyacid in a solution of the metal acetylacetonate complex in toluene. The exchange occurs on the surface of the solid particles and diffusion of protons and metal cations into the hydrated lattice leads to the substitution of all the protons. The method can be utilized in order to prepare supported vanadyl and copper molybdophosphates from supported heteropolyacids and they have been studied in the catalysis of the oxidative dehydrogenation of isobutyric acid. The effect of vanadyl counter-ions on the catalytic behavior is the same as observed with bulk catalysts but, on the contrary, copper supported molybdophosphate shows an acid catalytic activity not observed with bulk catalysts. |
| Databáze: | OpenAIRE |
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