Improved stability of Pd/Al2O3 prepared from palladium nanoparticles protected with carbosilane dendrons in the dimethyl ether steam reforming reaction
The dimethyl ether steam reforming reaction to generate hydrogen was tested over 1wt% Pd/Al2O3 catalysts prepared from different precursors. The conventional catalyst prepared by incipient wetness impregnation from palladium nitrate underwent strong deactivation under reforming conditions at 823K be...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/79994 |
| Acceso en línea: | https://hdl.handle.net/2117/79994 https://dx.doi.org/10.1002/cctc.201500202 |
| Access Level: | acceso abierto |
| Palabra clave: | Catalysis Hydrogen as fuel Nanoparticles Dendrimers Heterogeneous catalysis Hydrogen Palladium Supported catalysts Catàlisi Hidrogen com a combustible Nanopartícules Àrees temàtiques de la UPC::Energies Àrees temàtiques de la UPC::Enginyeria química::Química física |
| Sumario: | The dimethyl ether steam reforming reaction to generate hydrogen was tested over 1wt% Pd/Al2O3 catalysts prepared from different precursors. The conventional catalyst prepared by incipient wetness impregnation from palladium nitrate underwent strong deactivation under reforming conditions at 823K because of metal sintering and carbon deposition. The same occurred over the catalyst prepared from preformed Pd nanoparticles protected with dodecanethiol. In contrast, catalysts prepared from Pd nanoparticles protected with carbosilane dendrons showed enhanced stability and good performance for the production of hydrogen. This was because of the formation of SiO2 at the Pd-Al2O3 interface that acted as a pinning center and prevented Pd migration under the reaction conditions as well as the accumulation of carbon. |
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