Phosphates represent diverse complex systems, whose basic structural unit is tetrahedron. They are widely applied as catalysts, carriers of catalytic active substances, adsorbents and ion exchangers. Phosphoric acid phosphates act catalyst for reactions alkylation, cracking, izomerization, polymerization, hydrogenation dehydrogenation. some metals promote oxidation normal alkanes with derivatio...

Supported subnano-cluster catalysts are highly dynamic, developing true active sites only under the pressures and temperatures of reaction conditions. Operando X-ray absorption near-edge structure (XANES) spectroscopy can track changes in oxidation state local environment cluster atoms, providing insight into development these sites. While bulk metal, oxide, hydroxide standards often used for f...

A series of Pt/Al2O3 catalysts with uniform Pt particle sizes ranging from 0.95 to 2.62 nm was synthesized using the refilling method control growing nanoparticles and evaluated in propane dehydrogenation. An effect size on initial activity TOF demonstrated, smallest particles being most active. geometric model developed quantify surface site concentration for any fcc metal size. Comparing evol...