Journal ArticleDOI
Low-temperature CO oxidation over Co3O4-based catalysts: Significant promoting effect of Bi2O3 on Co3O4 catalyst
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TLDR
In this article, a modification of Co3O4 by Bi2O3 significantly enhanced its catalytic performance for CO oxidation and showed that the ability of low-temperature oxygen activation was the crucial factor to improve the performance.Abstract:
The modification of Co3O4 by Bi2O3 significantly enhanced its catalytic performance for CO oxidation. The 20 wt.% Bi2O3-Co3O4 exhibited the best catalytic performance. The results of H2-TPR and CO-TPR revealed that the mobility of oxygen was accelerated greatly and the ability of low-temperature oxygen activation was the crucial factor to improve the catalytic performance. Bi2O3 entered the lattice of Co3O4 caused the structural defect and lattice distortion, which should be the origin of the high O2 activation ability and mobility. Structure-performance correlation demonstrated that the low-temperature oxygen activation was dependent on the defective degree of structure, which was determined by the content of Bi2O3. The catalytic behaviors under different reaction conditions revealed that CO could effectively adsorb on the surface active sites and CO2 could competitively adsorb on the active sites. The ability to supply the active O2 species was suggested to be a key step. The kinetic data showed not only the amount of surface active sites were increased on the surface of Co3O4 but also the catalytic ability of single active site was enhanced greatly.read more
Citations
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Enhanced Stability of Low-Temperature CO Oxidation over K2CO3 Coupled CuO–MnOx–CeO2 Catalyst in the Presence of CO2, SO2 and NO2
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MnOx effect on the performance of Cu-based catalysts in ethynylation of formaldehyde for 1,4-butynediol synthesis
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Dual-site cooperation mediated by synergy in Mg-Co bimetallic oxide for high-performance styrene epoxidation reaction
TL;DR: In this article , a synergistic intermetallic catalysis between Mg and Co in MgCo2O4 is revealed to facilitate the epoxidation performance, with the roles of CoO and MgO sites in the OMgOCoO structure responsible for activity and selectivity, respectively.
Journal ArticleDOI
Dual-template synthesis of defect-rich mesoporous Co3O4 for low temperature CO oxidation
TL;DR: In this article , a defect-rich mesoporous Co3O4 was proposed for low temperature CO oxidation with a light-off temperature at -73 oC under the space velocity of 80 000 mL h-1 gcat-1.
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High catalytic performance of neodymium modified Co3O4 for toluene oxidation
TL;DR: In this paper , a small amount of rare earth (Ce, Pr, Sm and Nd) doping can dramatically promote the catalytic activity of Co3O4, which is the most promising catalysts in catalytic oxidation of VOCs.
References
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Journal ArticleDOI
Novel Gold Catalysts for the Oxidation of Carbon Monoxide at a Temperature far Below 0 °C
TL;DR: In this article, a variety of gold catalysts are used to catalyze the oxidation of carbon monoxide at temperatures as low as −70 °C and are stable in a moistened gas atmosphere.
Journal ArticleDOI
Low-temperature oxidation of CO catalysed by Co 3 O 4 nanorods
TL;DR: Tricobalt tetraoxide nanorods not only catalyse CO oxidation at temperatures as low as –77 °C but also remain stable in a moist stream of normal feed gas, showing the importance of morphology control in the preparation of base transition-metal oxides as highly efficient oxidation catalysts.
Journal ArticleDOI
The Structure of Catalytically Active Gold on Titania
Mingshu Chen,D. W. Goodman +1 more
TL;DR: Kinetic measurements for the catalytic oxidation of carbon monoxide show that the gold bilayer structure is significantly more active than the monolayer, thus eliminating particle shape and direct support effects.
Journal ArticleDOI
The Promotional Effect of Gold in Catalysis by Palladium-Gold
TL;DR: Acetoxylation of ethylene to vinyl acetate was used to investigate the mechanism of the promotional effect of gold (Au) in a palladium (Pd)-Au alloy catalyst, demonstrating that the critical reaction site for VA synthesis consists of two noncontiguous, suitably spaced, Pd monomers.
Journal ArticleDOI
Catalytic decomposition of N2O over CeO2 promoted CO3O4 spinel catalyst
TL;DR: A series of CeO2 promoted cobalt spinel catalysts were prepared by the co-precipitation method and tested for the decomposition of nitrous oxide (N2O) as mentioned in this paper.
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