The mechanism of carbon monoxide oxidation on metal oxides

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

“…The independence of adsorption heat of 0 is either due to the homogeneity of the surface oxygen or high mobility of bulk oxygen. As oxygen mobility in vanadia is known to be low at T < 400~ [18], one can conclude that V205 has a homogeneous surface oxygen at 0=30-45 %. In titanium dioxide oxygen is bound to the surface much stronger, qo2 is substantially higher than on VzO5 or V-Ti-O, and the surface oxygen is extremely inhomogeneous.…”

Study of reduction kinetics of mixed oxides NiO-V2O5 with hydrogen

“…As follows from the study of the sample morphology and from the dependence of the size of the coherent regions on composition, the higher surface area values for the samples containing an excess of NiO are determined not only by the high dispersity of its crystallites (Table 1), but predominantly bythe higher dispersity of its grains and agglomerates ( Fig. In addition to the presence of the weakly bonded (iodometrically non-detectable) forms of oxygen [9,10], the depletive chemisorption of ionogenic forms, which is characterized by a low degree of coverage of the V205 surface, has also been proved [8,11]. 2).…”