ArTS Archivio della ricerca di Trieste
ArTS è il sistema di gestione integrata dei dati della ricerca adottato dall' Università degli Studi di Trieste
EnglishThe effect of reduction temperature on the hydrogen adsorption and Rh dispersion in a Rh/Ce0.68Zr0.32O2 catalyst with texturally stable Ce0.68Zr0.32O2 support was investigated. Rh dispersion data were also obtained from Rh particle size analyses made using high-resolution transmission electron microscopy (HRTEM) images. Comparison of the dispersion values obtained by using the two techniques showed that H2 adsorption at -80 °C is a suitable tool for the estimation of Rh dispersion at reduction temperature, Tred, ≤500°C. For Tred > 500°C. a partial suppression of H2 chemisorption was observed. However, after a mild reoxidation and low temperature reduction, the H2 adsorption capacity of these samples was regenerated and good agreement with the HRTEM data was again obtained.
| Titolo: | Rhodium dispersion in a Rh/Ce0.68Zr0.32O2 catalyst investigated by HRTEM and H2 chemisorption |
| Autori: | |
| Data di pubblicazione: | 2000 |
| Rivista: | |
| Abstract: | The effect of reduction temperature on the hydrogen adsorption and Rh dispersion in a Rh/Ce0.68Zr0.32O2 catalyst with texturally stable Ce0.68Zr0.32O2 support was investigated. Rh dispersion data were also obtained from Rh particle size analyses made using high-resolution transmission electron microscopy (HRTEM) images. Comparison of the dispersion values obtained by using the two techniques showed that H2 adsorption at -80 °C is a suitable tool for the estimation of Rh dispersion at reduction temperature, Tred, ≤500°C. For Tred > 500°C. a partial suppression of H2 chemisorption was observed. However, after a mild reoxidation and low temperature reduction, the H2 adsorption capacity of these samples was regenerated and good agreement with the HRTEM data was again obtained. |
| Handle: | http://hdl.handle.net/11368/1694241 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/jp994101z |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
File in questo prodotto:
http://hdl.handle.net/11368/1694241
