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Article Dans Une Revue Applied Surface Science Année : 2021

Sol-gel synthesis of nanocrystalline MgO and its application as support in Ni/MgO catalysts for ethanol steam reforming

Luiz G Possato
  • Fonction : Auteur
Rosembergue G L Gonçalves
  • Fonction : Auteur
Rodrigo M M Santos
  • Fonction : Auteur
Thiago F Chaves
  • Fonction : Auteur
Valérie Briois
Sandra H Pulcinelli
  • Fonction : Auteur
Leandro Martins
  • Fonction : Auteur
Celso V Santilli
  • Fonction : Auteur

Résumé

This work reports the improved catalytic activity of nickel catalysts supported on nanocrystalline magnesium oxide prepared by a sol-gel method, with Pluronic P123 used 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 analyses using X-ray absorption spectroscopy, N 2 physisorption isotherms, transmission electron microscopy, and temperature-programmed CO 2 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 suppression of the total quantity of coke, with the catalyst prepared using surfactant developing less deactivating coke.

Domaines

Catalyse
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Dates et versions

hal-03441873 , version 1 (22-11-2021)

Identifiants

Citer

Luiz G Possato, Rosembergue G L Gonçalves, Rodrigo M M Santos, Thiago F Chaves, Valérie Briois, et al.. Sol-gel synthesis of nanocrystalline MgO and its application as support in Ni/MgO catalysts for ethanol steam reforming. Applied Surface Science, 2021, 542, pp.148744. ⟨10.1016/j.apsusc.2020.148744⟩. ⟨hal-03441873⟩
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