Hydroisomerization of n-heptane and dehydration of 2-propanol on bulk and supported WO2(Hx)ac on TiO2

Catalytic reactions of methylcyclohexane (MCH) on partially reduced MoO3

“…Similar arguments apply to the exclusion of a carbide species formation, such as Mo 2 C for molybdenum and WC for tungsten, at these experimental conditions, as postulated by Ribeiro et al [9,10] for the interpretation of the isomerization of alkanes via the bifunctional mechanism. Just to mention that partially reduced MoO 3 and WO 3 show comparable catalytic behavior for the isomerization of an alkane at a given reaction temperature [11,12]. Therefore, the formation of a Mo carbide, having metallic character, under the experimental conditions used in this work is excluded.…”

“…The metallic function in our catalytic system is completely due the conjugated p electrons in MoO 2 or in WO 2 as characterized by XPS-UPS techniques. On the other hand, the acidic function is mainly of a Brönsted Mo-OH type characterized by the O 1s spectral line at 531.6 eV and verified by the dehydration of isopropanol [11,12].…”

H2 reduction of hydrogen molybdenum bronze to porous molybdenum oxide and its catalytic properties for the conversions of pentane and propan-2-ol

“…Katrib and co-worker [31,32] reported that the MoO 2 phase was able to catalyze alkane isomerization through the bifunctional mechanism. By contrast, Wehrer et al [33] showed that MoO 2 alone as well as MoO 2 associated with Mo metal were very inefficient catalysts for alkane isomerization.…”

Selective skeletal isomerization of alkanes over partially reduced MoO3

“…The formation of the MoO 2 phase was not detected by XRD in Pt/ MoO 3 (H 2 ). Ledoux and co-workers [31] reported that [32][33][34][35][36] stated that the MoO 2 phase formed by reduction of MoO 3 contributed to the isomerization of alkanes. Dehydrogenation and hydrogenation reactions take place on the delocalized electrons p along the c-axis of the Mo atoms in the MoO 2 deformed rutile phase.…”