Onium-decavanadate ion-pair complexes as catalysts in the oxidation of hydrocarbons by O2

László J. Csányi, Károly Jáky, György Dombi, Ferenc Evanics, Gergely Dezsö, Zoltán Kóta

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The catalysed oxidations of hydrocarbons were found to involve radicals and to be inhibited effectively by phenolic scavengers. The dependences of the activities of the catalysts on their concentrations are explained by the structural changes in the inverse micelles, from the first small spherical associates through an open-layered more active structure, which finally folds back by forming a hollow spherical closed structure, with a fall in the rate. The 51V NMR spectral behaviour of the ion-pair catalysts and the colour changes in the solutions are discussed. The decavanadate structure is not destroyed entirely during the catalysed oxidation, in spite of the partial reduction of the V(V) centres and some structural deformations. The essential role of water and the influence of the products of oxidation by O2 on the courses of the reactions are also discussed.

Original languageEnglish
Pages (from-to)101-111
Number of pages11
JournalJournal of Molecular Catalysis A: Chemical
Volume195
Issue number1-2
DOIs
Publication statusPublished - Mar 18 2003

Keywords

  • Catalysed oxidation of Ch and T by O
  • Influence of the reaction products on the oxidation of hydrocarbons
  • Onium-decavanadate ion-pair complexes as oxidation catalysts

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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