Abstract
With a one-step reverse-phase microemulsion method, surface-amine-modified cobalt-silicon mixed oxide (BA-Co-SiO2) was successfully prepared, which was characterized by SEM, FTIR, UV-Vis DRS, XPS, TG-DTA, N2 adsorption-desorption, and hydrophobicity/lipophilicity measurement, etc. In-situ introduction of organic amine on the surface caused three positive effects on the improvement of the catalytic oxidation ability: the first one is to generate a higher specific surface area; the second one is to modify the surface of the catalyst to be more hydrophobic and lipophilic; and the third one is to facilitate the generation of Co(III) with a higher valence state that owns a stronger oxidation ability. Under the solvent-free conditions and with molecular oxygen as the oxidant, BA-Co-SiO2 showed a much higher catalytic activity for the selective oxidation of ethylbenzene compared with Co-SiO2 without amine. The reported results supplied a good reference for designing the efficient catalyst through the modification of the surface property and catalyst’s structure with a simple in-situ method.
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Acknowledgements
We gratefully acknowledge financial support of this work by the National Natural Science Foundation of China (21872075), the Natural Science Foundation of Ningbo (202003N4096), and K.C. Wang Magna Fund in Ningbo University.
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Chen Lu: Conceptualization, Formal analysis, Investigation, Data curation, Writing-original draft. Chen Chen & Hongying Lü: Conceptualization, Writing-review & editing, Funding acquisition, Supervision, Project administration. Qiaohong Zhang: Method & English polish. KeFan Yu: Investigation & Formal analysis.
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Lu, C., Zhang, Q., Chen, C. et al. Selective Oxidation of Alkyl Hydrocarbon with Molecular Oxygen Catalyzed by Surface-Amine-Modified Cobalt-Silicon Mixed Nano Oxides. Catal Lett (2024). https://doi.org/10.1007/s10562-024-04687-x
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DOI: https://doi.org/10.1007/s10562-024-04687-x