Enhanced Acetone Oxidation over the CeO₂/Co₃O₄ Catalyst Derived from Metal–Organic Frameworks

Abstract

A novel CeO2/Co3O4 catalyst with a high catalytic activity has been designed and prepared by pyrolysis of metal–organic frameworks, and its catalytic performance was evaluated by the acetone catalytic oxidation reaction. The Co3O4–M catalyst with T 90 at 194 °C was prepared by pyrolysis of the MOF-71 precursor, which was 56 °C lower than that of commercial Co3O4 (250 °C). By the addition of cerium to the MOF-71 precursor, an enhanced CeO2/Co3O4 catalyst with T 90 at 180 °C was prepared. Importantly, the CeO2/Co3O4 catalyst exhibited superior stability for acetone oxidation. After 10 cycle tests, the conversion could also be maintained at 97% for at least 100 h with slight activity loss. Characterization studies were used to investigate the influence of cerium doping on the property of the catalyst. The results showed that addition of cerium could facilitate the expansion of the surface area and enhance the porous structure and reducibility at low temperature. Furthermore, the surface ratio of Co3+/Co2+ and mobile oxygen obviously improved with the addition of cerium. Therefore, the metal oxides prepared by this method have potential for the elimination of acetone.

Bimetallic MOF-Derived Synthesis of Cobalt-Cerium Oxide Supported Phosphotungstic Acid Composites for the Oleic Acid Esterification

“…e result is similar to our previous reports [27]. After calcination, XRD patterns of the HPW@CoCeO sample display the intensity of the CoCe-MOF sample characteristic peaks decreased or even disappeared, and two strong diffraction peaks at 18.2 °and 28.7 °are assigned to cobaltosic oxide and cerium oxide, respectively [28], implying that the CoCe-MOF transformed to CoCeO after pyrolysis. is also indicates that the HPW@ CoCeO catalyst was successfully synthesized.…”

Interfacial effects in CuO/Co3O4 heterostructures enhance benzene catalytic oxidation performance

“…A sample with low-temperature reducibility generally exhibits better performance since the rapid redox cycle is favourable for oxygen activation. 80,81 The adsorption performance of gaseous O 2 and benzene was evaluated using the TPD technique. Fig.…”

A Facile Method to Synthesize Co3O4 Catalyst for Efficient Chlorobenzene Combustion

“…Table 1 shows S BET , total pore volume and average radii of the pore of the all samples according to N 2 adsorption‐desorption experiments. Compared with the other samples, Co 3 O 4 ‐A has better adsorption capacity, increasing the opportunity for the contact between CB and active sites, result in a better catalytic performance [47–48] . The irregular holes existing in the catalyst is working as the free shuttles of VOCs reaction gas between catalyst active sites and VOCs molecules, and enhancing catalytic oxidation reaction of VOCs.…”