Catalytic synergy via spillover at low temperature: the dehydration and dehydrogenation of sec-butanol in the presence of oxygen

Oxygen Exchange between Palladium and Oxide Supports in Combustion Catalysts

“…Much less attention has been paid to oxygen mobility. Delmon was one of the first to outline the importance of spillover of oxygen in selective catalytic oxidation reactions, − for induced phase stabilization, for preventing catalyst deactivation, and for catalyst regeneration processes . Oxygen mobility was evidenced from the synergetic or cooperative effect observed between phases of multicomponent catalysts used in industrial oxidation processes. , A new type of mechanism, denoted remote control, was used to explain the specific activity of a group of mechanical mixtures of metal oxides (MoO 3 - Sb 2 O 4 , SnO 2 - Sb 2 O 4 , ...) in the selective catalytic oxidation of isobutene to methacrolein. , More recently, it has been proposed that oxygen spillover may induce the creation of new selective sites via surface reconstruction during the reaction. ,, …”

Oxygen surface mobility and isotopic exchange on oxides: role of the nature and the structure of metal particles

“…Much less attention has been paid to oxygen mobility. Nevertheless, Delmon was one of the first to outline the importance of spillover oxygen in selective catalytic oxidation reactions [7][8][9][10][11][12][13][14][15], induced phase stabilization preventing catalysts deactivation [8,16] and catalyst regeneration processes [17]. The evidence of oxygen mobility came from the synergetic or cooperative effect observed between phases of multicomponent catalysts used in industrial oxidation processes [18][19][20].…”

Catalytic Performances and Stability of Three Sb−Mo−O Phases in the Selective Oxidation of Isobutene to Methacrolein

“…It was shown that surface contamination layers of Sb ions on MoO 3 or of Mo ions on α-Sb 2 O 4 did not form in the catalytic conditions. On the contrary, when prepared artificially, these layers were unstable and their transformation led to a decontamination under the reaction conditions, namely the breaking of the layer and its sintering to crystallites. ,− The situation was similar when considering the formation of bulk mixed phases containing Sb, Mo, and O simultaneously. Except for the work mentioned before using a mixture containing (010)-oriented MoO 3 , the formation of a Sb−Mo−O phase was never detected in the used mixtures of MoO 3 and α-Sb 2 O 4 .…”