Solid-state chemistry route for supported tungsten and tungsten carbide nanoparticles
| Autor: | N. Hugot, A. Albiniak, G. Furdin, Claire Hérold, Sébastien Fontana, Alexandre Desforges, Jean-François Marêché |
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| Rok vydání: | 2012 |
| Předmět: |
Solid-state chemistry
Materials science Mineralogy Nanoparticle chemistry.chemical_element Chemical vapor deposition Tungsten Condensed Matter Physics Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound Chemical engineering chemistry Tungsten carbide Phase (matter) Materials Chemistry Ceramics and Composites Tungsten hexachloride Physical and Theoretical Chemistry Carbon |
| Zdroj: | Journal of Solid State Chemistry. 194:23-31 |
| ISSN: | 0022-4596 |
| Popis: | Nanoparticles of tungsten and tungsten carbide have been prepared using solid-state chemistry methods. After the vapor phase impregnation of a tungsten hexachloride precursor on a carbon support, a temperature-programmed reduction/carburization was performed. Several parameters were investigated and the evolution of obtained samples was followed by XRD and TEM. The optimization of the reaction parameters led to the preparation of W, W2C and WC particles well dispersed on the support. WC phase however could not be obtained alone with less than 10 nm mean size. This could be explained by the carburization mechanism and the carbon diffusion on the support. |
| Databáze: | OpenAIRE |
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