Supported vanadium oxides have been known to be highly active for the selective oxidation of alcohols to corresponding aldehydes, and catalytic activity and selectivity for the alcohol oxidation widely depend on surface structures of supported vanadium species. We have succeeded in measuring the dynamic behaviors of supported vanadium catalysts on silica and alumina during selective ethanol oxidation to acetaldehyde by in-situ time-resolved energy-dispersive XAFS and Raman spectrocopy and found the kinetics of structural changes in the supported vanadium catalysts during the selective oxidation. The structural kinetics of the supported vanadium catalysts revealed reaction mechanism and accounts of different aldehyde selectivity on the supported vanadium-oxide catalysts for the first time.
ASJC Scopus subject areas
- Chemical Engineering(all)