Structure of Co and Co oxide clusters in MCM-41

The structural properties of Co/MCM-41 with pore diameters between 2.9 and 3.6 nm prepared by direct synthesis and impregnation were investigated. For both preparation methods, the size of the metal particles decreased with the pore diameter. For Co/MCM-41 with the same pore diameter we observed tha...

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Bibliographic Details
Published in:Catalysis today 1998-03, Vol.39 (4), p.311-315
Main Authors: Jentys, A, Pham, N.H, Vinek, H, Englisch, M, Lercher, J.A
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Chemistry
Co in MCM-41
Exact sciences and technology
EXAFS
General and physical chemistry
Particle size determination
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The structural properties of Co/MCM-41 with pore diameters between 2.9 and 3.6 nm prepared by direct synthesis and impregnation were investigated. For both preparation methods, the size of the metal particles decreased with the pore diameter. For Co/MCM-41 with the same pore diameter we observed that the direct synthesis method led to significantly smaller metal clusters compared to the impregnation method. For all Co/MCM-41 samples constraints of the metal cluster sizes were observed, which are speculated to result from influences of the micro structure during the formation of the catalyst precursor.
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(97)00119-3