Interaction of oxygen with the surface of vanadia catalysts

Effect of VOx Species and Support on Coke Formation and Catalyst Stability in Nonoxidative Propane Dehydrogenation

“…[29][30][31][32][33][34][35][36][37][38][39][40] In Figure 1, the UV/Vis spectra of 5V/MCM-41, 4V/S10, 6V/S10, 13 V/S10a nd 3V/Al 2 O 3 are shown (for abbreviations see Experimental Section). Briefly,t he number in front gives the rounded vanadium weightc ontent, the index in the Siral formula stands for aw eight percentage of SiO 2 .T he spectra of other V/Siral catalysts with Vl oading of 4-5 wt %w ere similartot hat of 4V/S10.…”

Catalytic activity of Fe/ZrO2 nanoparticles for dimethyl sulfide oxidation

“…It may be due to the fact that large amounts of active oxygen species formed during ozone decomposition which effectively oxidizes intermediates on the surface of the catalysts. It is observed that the selectivity of catalysts is governed by the nature of oxygen species; electrophilic oxygen species such as O 2 À and O À are responsible for total oxidation of hydrocarbons, whereas the nucleophilic lattice stabilized O 2À is responsible for the formation of partial oxidation products [73]. According to these analytical results, it is assumed that a small amount of partially oxidized byproducts could be formed and deposited on the surface of the iron oxide catalyst during DMS oxidation.…”

On the asymmetry in molybdenum–oxygen bonding in the MoO3 structure: ETS–NOCV analysis

“…Among many examples in catalysis, the theoretical investigations on the structural and electronic surface properties and the catalytic reactions of transition-metal oxides, in particular based on vanadium and molybdenum, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] are especially important as they provided a deep insight into the structure-activity relationship of these compounds, used in a variety of applications.…”