Nature of the active oxygen of Co3O4

Razdobarov, V.A.; Садыков, В. А.; Veniaminov, S. A.; Bulgakov, N. N.; Коваленко, О. В.; Pankratiev, Yu. D.; Popovskii, V. V.; Kryukova, G. N.; Tikhov, S. F.

doi:10.1007/bf02061718

Cited by 18 publications

(11 citation statements)

References 5 publications

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“…Razdobarov et al. investigated the nature of the active oxygen of Co 3 O 4 by different techniques including O 2 ‐TPD 142. They used Greek characters to name the peaks but with a shift with respect to Wang et al., O α desorbing between 20 and 90 °C, O β between 110 and 220 °C (i.e.…”

Section: Co Oxidation Over Simple Oxide Catalystsmentioning

confidence: 99%

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

2010

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International audienceOxidation into CO2 is a major solution to CO abatement in air depollution treatments. The development of catalytic converters led to an extraordinary high number of publications on metal catalysts during the last fifty years. Due to the increasing price of noble metals and to remarkable progresses in oxide syntheses, catalytic oxidation of carbon monoxide over oxide catalysts has recently gained in interest, even if some oxides are known to present remarkable activity since the beginning of the 20th century. In this Review, the kinetics and mechanism of CO oxidation on single and mixed oxides are examined, alongside the catalyst structure

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Section: Co Oxidation Over Simple Oxide Catalystsmentioning

confidence: 99%

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

2010

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“…The noble metals are known to be very active for the NO oxidation [44][45][46]. Additionally, the activity for NO oxidation is expected to benefit from a decreasing oxygen bond strength on the catalyst, as for example Co 3 O 4 , which binds oxygen relatively weakly [88,89], exhibits a significant activity in this reaction [90].…”

Section: Catalytic Oxidation In Loose Contact With a Catalystmentioning

confidence: 99%

Effect of NO2 and water on the catalytic oxidation of soot

Christensen

Grunwaldt

Jensen

2017

Applied Catalysis B: Environmental

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“…For metal oxides the heat of oxygen desorption from the surface generally depends strongly on the coverage. If the surface of an oxide equilibrated in an oxidizing atmosphere is partially reduced the heat of desorption of the remaining oxygen increases significantly [24,30]. The presently employed heats of desorption for metal oxides generally correspond to the most weakly adsorbed oxygen (the differential heat) on surfaces equilibrated in an oxidizing atmosphere at 500 °C.…”

Section: Sources For the Heat Of Oxygen Chemisorptionmentioning

confidence: 99%

“…Boreskov and co-workers [24] proposed that for metal oxide catalysts the oxygen bond strength on the catalyst surface, as measured by the heat of oxygen chemisorption, is a determining factor for activity in reactions involving oxygen activation. This has been observed to be the case in oxygen activation reactions such as 16 O 2 / 18 O 2 isotopic exchange [24] and oxidation of CH 4 [24], C 3 H 6 [25], H 2 [24][25][26][27] and CO [28][29][30]. The activity in the catalytic oxidation of CO on thin metal oxide films has also been correlated to the activation energy for oxygen desorption [31], which scales with the heat of chemisorption.…”

Section: Introductionmentioning

confidence: 99%

Importance of the oxygen bond strength for catalytic activity in soot oxidation

Christensen

Grunwaldt

Jensen

2016

Applied Catalysis B: Environmental

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The oxygen bond strength on a catalyst, as measured by the heat of oxygen chemisorption, is observed to be a very important parameter for the activity of the catalyst in soot oxidation. With both intimate contact between soot and catalyst (tight contact) and with the solids stirred loosely together (loose contact) the rate constants for a number of catalytic materials outline a volcano curve when plotted against their heats of oxygen chemisorption. However, the optima of the volcanoes correspond to different heats of chemisorption for the two contact situations. In both cases the activation energies for soot oxidation follow linear Brønsted-Evans-Polanyi relationships with the heat of oxygen chemisorption. Among the tested metal or metal oxide catalysts Co 3 O 4 and CeO 2 were nearest to the optimal bond strength in tight contact oxidation, while Cr 2 O 3 was nearest to the optimum in loose contact oxidation. The optimum of the volcano curve in loose contact is estimated to occur between the bond strengths of α-Fe 2 O 3 and α-Cr 2 O 3 . Guided by an interpolation principle Fe a Cr b O x binary oxides were tested, and the activity of these oxides was observed to pass through an optimum for an FeCr 2 O x binary oxide catalyst, which exhibited a rate constant at 550 °C that was 2.3 times higher than the one for pure α-Cr 2 O 3 and 29 times higher than the one for pure α-Fe 2 O 3 .

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Nature of the active oxygen of Co3O4

Cited by 18 publications

References 5 publications

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

Effect of NO2 and water on the catalytic oxidation of soot

Importance of the oxygen bond strength for catalytic activity in soot oxidation

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