Preparation and characterisation of metal oxides supported on SBA-15 as methane combustion catalysts

作者：Laugel Guillaume^*; Arichi Jaouad; Bernhardt Pierre; Moliere Michel; Kiennemann Alain; Garin Francois; Louis Benoit

来源：Comptes Rendus Chimie, 2009, 12(6-7): 731-739.

DOI：10.1016/j.crci.2008.09.031

• Metal oxides
• SBA-15
• Mesopores
• Catalytic combustion
• Methane

A high dispersion Of Co(3)O(4) and Mn(3)O(4) nanoparticles on SBA-15 mesoporous silica was carried out thanks to a two-solvent impregnation method. This kind of preparation allows a proper control of both the metal oxides loading (7 or 30 wt.%) and the particle sizes (10-12 nm). A complete set of physico-chemical characterisations of Co(3)O(4) and Mn(3)O(4) supported oxides on SBA-15 was realized using several techniques such as XRD, BET, TEM and XPS, to correlate the structures of the materials with their catalytic activities.
Co(3)O(4)/SBA-15 and Mn(3)O(4)/SBA-15, 7% in weight, exhibit a high catalytic performance in the combustion of methane under Lower Explosive Limit (LEL) conditions, comparable to the well-known LaBO(3) (B = Co or Mn) perovskite-type. The efficiency of the catalysts can be explained by the organised porous meso-structure of the SBA-15. Indeed, the mesoporous support creates a confinement medium which permits a high dispersion of metal oxide nanoparticles. The Co(3)O(4) and Mn(3)O(4) nanoparticles supported on SBA-15 become therefore novel efficient combustion catalysts at low metal oxides' loading. To cite this article: G. Laugel et al., C R. Chimie 12 (2009).

• 出版日期2009-7