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Methanol oxidation on LaCo mixed oxide supported onto MCM-41 molecular sieve |
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| Authors: | E.V. Makshina N.S. Nesterenko S. Siffert E.A. Zhilinskaya A. Aboukais B.V. Romanovsky |
| Affiliation: | aDepartment of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119992 Moscow, Russia bLaboratory of Catalysis and Environment, E.A. 2598, University of Littoral – Côte d’Opale, 145 Avenue Schumann, 59140 Dunkerque, France |
| Abstract: | Lanthanum cobaltate LaCoOx supported onto MCM-41 mesoporous molecular sieve was prepared by in-situ oxidative decomposition of mixed LaCo citrate complexes inside the mesopores of this support. The prepared materials were characterized by EDX, EPR and UV-Vis DRS techniques as well as by N2-BET measurements. The nanosized LaCoOx particles within the mesopores of MCM-41 matrix contains cobalt atoms in lower than Co(III) average oxidation state. Also, the supported cobaltate does not form short-range order species of LaCoO3 but presents as the highly disordered, oxygen deficient Co oxide nanophase. Catalytic activity in MeOH oxidation was tested using both conventional fixed-bed flow system and “operando” mode of DRIFT technique. The very high activity of MCM-41-supported cobaltate is not only due to highly dispersed LaCoO3 phase but also because of rather low oxidation state of Co. |
| Keywords: | Perovskite Nanostructured LaCoO3 MCM-41 Methanol oxidation |
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