Effects of Anion Substitution in (Mo,V)5O14 on Catalytic Performance in Selective Propene Oxidation to Acrolein
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2016-01-15 |
| Journal | ChemCatChem |
| Authors | Sven KĂźhn, Dominik A. Weber, Martin Lerch, Thorsten Ressler |
| Institutions | Technische Universität Berlin |
| Citations | 1 |
Abstract
Section titled âAbstractâAbstract Molybdenumâbased mixed oxides represent wellâknown model catalysts for the selective oxidation of light alkenes. Here, the anion lattice of (Mo,V) 5 O 14 was for the first time modified by substituting oxygen ions with nitrogen ions. Investigations by XRD analysis, Xâray absorption spectroscopy, and FTIR spectroscopy revealed that the incorporation of nitrogen in the structure of Mo 5 O 14 proceeded without changing the average valence of metal centers. Additionally, impedance spectroscopy confirmed the formation of oxygen vacancies. Significant changes in conductivities remained after the removal of nitrogen. Temperatureâprogrammed reduction measurements were performed to investigate oxygen mobility. The enhanced reducibility of oxide nitrides correlated with the increased conductivity. Catalytic performance in selective propene oxidation was determined by online mass spectrometry und gas chromatography at different temperatures. Selectivity towards acrolein increased with increasing conductivity whereas the formation of total oxidation products CO x decreased.