Enhancement of Mineralization Ability and Water Resistance of Vanadium-Based Catalysts for Catalytic Oxidation of Chlorobenzene by Platinum Loading.

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  • Additional Information
    • Source:
      Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE
    • Publication Information:
      Publication: Washington DC : American Chemical Society
      Original Publication: Easton, Pa. : American Chemical Society, c1967-
    • Subject Terms:
      Platinum*/chemistry ; Oxidation-Reduction* ; Chlorobenzenes*/chemistry ; Water*/chemistry; Catalysis ; Vanadium/chemistry ; Cerium/chemistry
    • Abstract:
      The design of a catalyst with multifunctional sites is one of the effective methods for low-temperature catalytic oxidation of chlorinated volatile organic compounds (CVOCs). The loss of redox sites and competitive adsorption of H 2 O prevalent in the treatment of industrial exhaust gases are the main reasons for the weak mineralization ability and poor water vapor resistance of V-based catalysts. In this work, platinum (Pt) is selected to combine with the V/CeO 2 catalyst, which provides more redox sites and H 2 O dissociative activation sites and further enhances its catalytic performance. The results show that PtV/CeO 2 achieves 90% of the CO 2 yield at 318 °C and maintains excellent catalytic activity rather than continuous deactivation within 15 h after water vapor injection. The formation of Pt-O-V bonds enhances the redox ability and promotes deep oxidation of polychlorinated intermediates, accounting for the significantly improved mineralization ability of PtV/CeO 2 . The dissociative activation effect of Pt on H 2 O molecules strengthens the migration and activation of V-adsorbed H 2 O, precluding V-poisoning and notably improving water resistance. This study lays a solid foundation for the efficient degradation of chlorobenzene under humid conditions.
    • Contributed Indexing:
      Keywords: V-based catalysts; catalytic oxidation; chlorinated volatile organic compounds; mineralization; water resistance
    • Accession Number:
      49DFR088MY (Platinum)
      0 (Chlorobenzenes)
      059QF0KO0R (Water)
      00J9J9XKDE (Vanadium)
      K18102WN1G (chlorobenzene)
      30K4522N6T (Cerium)
    • Publication Date:
      Date Created: 20240822 Date Completed: 20240903 Latest Revision: 20240903
    • Publication Date:
      20240903
    • Accession Number:
      10.1021/acs.est.4c04533
    • Accession Number:
      39169771