Calorimetric study of the oxygen bond energy in a binary V−Ti catalyst and individual vanadium and titanium oxides

Abstract

Bond energy of oxygen hi a binary V-Ti catalyst and individual V and Ti oxides has been studied by the calorimetric method. The samples studied were shown to be si~ificantly different in bond energy, homogeneity of surface oxygen and mobility of the bulk one. Vanadium and titanium oxides appeared to interact in the binary system to form an active surface with redox properties very different from those of the individual oxides.

Kinetics of oxidation of β-picoline to nicotinic acid over vanadia-titania catalyst. 4. Kinetic model

“…Taking into account high mobility of bulk oxygen in the V-Ti catalyst that makes the surface oxygen homogeneous in a wide coverage range, we assume that the oxygen atoms in these complexes are equivalent (with the adsorption energy 55-60 kcal/mol) [8]). …”

Microwave assisted heterogeneous vapor-phase oxidation of 3-picoline to nicotinic acid over vanadium–titanium oxide catalytic system

“…Coherent stacking was found as a distinctive feature of the binary catalysts containing 20-75% of vanadium oxide and 80-25% of titanium oxide (anatase) [6]. Oxygen in these binary catalysts demonstrated lower bond energy and higher mobility allowing for the enhanced catalyst redox properties compared to the individual oxides [34].…”

10.1007/s10975-008-1016-3

“…According to calorimetric data, the surface oxygen binding energy for anatase titanium dioxide increases from 80 to 110 kcal/mol as the extent of surface reduction increases from 15 to 20% ML [14]. The surface q O 2 oxygen binding energy derived from oxygen thermal desorption data for anatase is 59 kcal/mol [15].…”