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Issue 22, 2018
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Polyoxometalate catalysts with co-substituted VO2+ and transition metals and their catalytic performance for the oxidation of isobutane

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Abstract

Cs-Salts of the Keggin-type phosphomolybdic acid with simultaneous doping of VO2+ and different transition metals are prepared, characterized and tested as catalysts for the oxidation of isobutane to methacrylic acid under isobutane-rich conditions. The results show that Cs2.0V0.3Cu0.2PMo12O40 catalyst with co-substituted VO2+ and Cu2+ in its secondary structure exhibits higher catalytic performance than those with co-doped VO2+ and other transition metals such as Fe, Ni and Ce. This difference is ascribed to the synergistic effect between Cu2+ and VO2+ only in the secondary structure. This synergistic effect is related to the charge transfer between Mo6+ in the Keggin anions and Cu2+ counter cation, which promotes the re-oxidation of the catalyst and consequently its catalytic activity.

Graphical abstract: Polyoxometalate catalysts with co-substituted VO2+ and transition metals and their catalytic performance for the oxidation of isobutane

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Publication details

The article was received on 30 May 2018, accepted on 03 Oct 2018 and first published on 04 Oct 2018


Article type: Paper
DOI: 10.1039/C8CY01101J
Citation: Catal. Sci. Technol., 2018,8, 5774-5781
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    Polyoxometalate catalysts with co-substituted VO2+ and transition metals and their catalytic performance for the oxidation of isobutane

    Y. Liu, J. He, W. Chu and W. Yang, Catal. Sci. Technol., 2018, 8, 5774
    DOI: 10.1039/C8CY01101J

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