The facet effect of ceria nanoparticles on platinum dispersion and catalytic activity of methanol partial oxidation
Kasala Prabhakar Reddy, Hanseul Choi, Daeho Kim, Minkee Choi, Ryong Ryoo, Jeong Young Park
Abstract
The effect of platinum-supported nano-shaped ceria catalysts on methanol partial oxidation and methyl formate product selectivity has been investigated. A Pt-supported CeO2 nanocube catalyst had a higher turnover frequency than nanosphere catalysts; however, nanosphere catalysts showed higher selectivity towards methyl formate. The observed ceria shape effect in catalysis was associated with the shape-dependent Pt dispersion and its oxidation states. Furthermore, in situ studies revealed that the reduced platinum and mono-dentate methoxy group were responsible for the higher turnover frequency.
Topics & Concepts
Partial oxidationCatalysisMethanolMethyl formateSelectivityPlatinumPlatinum nanoparticlesFormateDispersion (optics)NanoparticleChemistryInorganic chemistryMaterials scienceChemical engineeringNanotechnologyOrganic chemistryOpticsEngineeringPhysicsCatalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsCatalysis and Hydrodesulfurization Studies