Mixed metal amorphous and spinel phase oxidation catalysts derived from carbonates

2 Mixed metal amorphous and spinel phase oxidation catalysts derived from carbonates 

Ordering of vacancies also plays a key role in selective oxidation catalysis over perovskite-based catalysts such as CaMnOs oxides. CaMnOs has a CaTiOs (AMO3) perovskite structure which is made up of cations coordinated to 12 0 anions. They, in turn, are connected to corner-sharing MoOe octahedra. CaMnOs was used as a model catalyst on a laboratory scale by Thomas et al (1982) in propene oxidation to benzene and 2-methyl propene to paraxylene. In such reactions the compounds are found to undergo reduction to form anion-deficient metastable phases of the type CaMnOs-x where 0 x 0.5, forming several distinct phases. 

11 Electronic structure of crystallites and dopant distributions by catbodoluminescence electron microscopy 

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