Efficient hydrogen production from ammonia over Ru-Co/SiC catalysts
This study provides a valuable insight into the influence of the order impregnation of ruthenium and cobalt on ß-SiC support as catalysts for efficient green hydrogen production from ammonia. The catalysts were characterized using different techniques such as Temperature Programmed Reduction, X-Ray...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Castilla-La Mancha |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/43641 |
| Acceso en línea: | https://hdl.handle.net/10578/43641 |
| Access Level: | acceso abierto |
| Palabra clave: | Ammonia decomposition Bimetallic Cobalt Hydrogen Ruthenium Silicon carbide |
| Sumario: | This study provides a valuable insight into the influence of the order impregnation of ruthenium and cobalt on ß-SiC support as catalysts for efficient green hydrogen production from ammonia. The catalysts were characterized using different techniques such as Temperature Programmed Reduction, X-Ray Diffraction, Transmission Electron Microscopy and Scanning Electron Microscopy. The addition of Ru clearly changed the reduction profile, decreasing the temperature to obtain metallic species. The catalyst prepared by co-impregnation inhibited the formation of Co silicates, which are very difficult to reduce. Additionally, the metal size was also affected by the order of impregnation, with the co-impregnation method showing the smallest crystallite sizes and the highest hydrogen production. On the other hand, it was found that the 2.5 wt% total metal content catalyst improved the hydrogen production rate by 41 % compared to 5 wt% total metal content at 350 ºC, justifying the use of a lower metal loading. Therefore, the highest activity was achieved with a Ru/Co co-impregnation with a 50/50 wt ratio and a metal loading of 2.5 wt%, which exhibited excellent activity and stability with 95 % conversion over 50 hours of reaction. |
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