Nanoscale redox catalysts: Cr- and Cr,Al-pillared layer clays: Characterization and catalytic activity

Imre Kiricsi, Árpád Molnár, István Pálinkó, Ágnes Fudala, János B. Nagy

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Via the co-hydrolysis of CrCl3 and AlCl3, in the presence of swollen Na-montmorillonite, pillared layer clays were prepared. The location of chromium in the pillars and in the primary pillaring agent, the Al13-Keggin ion, was investigated by various methods (mid and far IR and 27Al NMR spectroscopies). We found that isomorphous substitution of chromium for aluminium did not occur, rather co-hydrolysis and co-pillaring took place. Upon heat treatment the loss of outer-sphere water and dehydroxylation at higher temperatures resulted in the formation of bulky alumina pillars decorated with chromia species. The resulting material was used in the oxidation of 1-phenyl-1-propanol in the presence of tert-butylhydroperoxide as co-oxidant.

Original languageEnglish
Pages (from-to)793-797
Number of pages5
JournalSolid State Ionics
Volume101-103
Issue numberPART 1
Publication statusPublished - Nov 1 1997

Keywords

  • Cr- and Cr,Al-pillared layer clays
  • IR and Al NMR spectroscopies
  • Oxidation in the liquid phase
  • Viability of isomorphous substitution

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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