The microstructure and properties of framework zirconium phosphates based nanocomposites - catalysts of alkane isomerization

Nanocomposites based upon framework zirconium phosphates with supported WO3 , MoO3 and Pt nanoparticles were synthesized via the incipient wetness impr egnation of high-surface-area mesoporous phosphate samples with water solut ions of corresponding salts followed by drying and calcination. The structu re and surface properties of nanocomposites were studied by using combinati on of structural and spectral methods. due to a strong interaction between supports and supported species, the structure of the latter differs conside rably from that of the bulk phases. Surface acid centers typical for zircon ium phosphates disappear suggesting their participation in bonding nanopart icles of promoters. Instead. new types of strong acid sites associated with tungsten oxide clusters emerge. The effect of these promoters on performan ce of zirconium phosphates in the reaction of pentane and hexane isomerizat ion is considered.