Sol-gel synthesis of nanocrystalline MgO and its application as support in Ni/MgO catalysts for ethanol steam reforming
This work reports the improved catalytic activity of nickel catalysts supported on nanocrystalline magnesium oxide prepared by a sol–gel method, using Pluronic P123 as a structure-directing agent for pore formation. The presence of Pluronic also provided a reduction of the magnesium oxide crystallit...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/208275 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.apsusc.2020.148744 http://hdl.handle.net/11449/208275 |
| Access Level: | acceso abierto |
| Palabra clave: | Coke formation Ethanol steam reforming MgO Nickel catalysts Sol–gel |
| Sumario: | This work reports the improved catalytic activity of nickel catalysts supported on nanocrystalline magnesium oxide prepared by a sol–gel method, using Pluronic P123 as a structure-directing agent for pore formation. The presence of Pluronic also provided a reduction of the magnesium oxide crystallite size from 54 to 18 nm, as well as the attainment of small supported metallic nickel particles. In situ X-ray diffraction was used to assess the structural evolution of the materials during activation, followed by X-ray absorption spectroscopy, N2 physisorption isotherms, transmission electron microscopy, and temperature-programmed CO2 desorption. The materials synthesized with the surfactant presented heightened activity in the ethanol steam reforming reaction. The long-term stability of the catalysts was improved, due to the decrease the coke formation, with the catalyst prepared using surfactant developing less deactivating coke. |
|---|