Nanocrystalline gold supported on Fe-, Ti- and Ce-modified hexagonal mesoporous silica as a catalyst for the aerobic oxidative esterification of benzyl alcohol

Luciana A. Parreira, Nina Bogdanchikova, Alexey Pestryakov, T. A. Zepeda, Inga Tuzovskaya, M. H. Farías, Elena V. Gusevskaya

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The materials containing gold nanoparticles supported on pure and Ce, Ti, or Fe-modified hexagonal mesoporous silica were prepared and their structural and electronic properties were studied by XRD, TEM, XPS, and N2 adsorption techniques. The materials were shown to be effective heterogeneous catalysts for the liquid-phase aerobic oxidation of benzyl alcohol in methanol solutions. It was found that the modifiers significantly improve the catalytic properties of supported gold particles and allow performing the selective one-pot oxidative esterification of benzyl alcohol resulting in methyl benzoate. The modified catalysts exhibited high activity (turnover frequencies of up to ca. 1000 h-1), selectivity to methyl benzoate (up to 95%), and stability (turnover numbers of up to ca. 4300). Ce and Ti were found to be more effective promoters as compared with Fe in terms of catalyst stability.

Original languageEnglish
Pages (from-to)145-152
Number of pages8
JournalApplied Catalysis A: General
Volume397
Issue number1-2
DOIs
Publication statusPublished - 30 Apr 2011

Keywords

  • Benzyl alcohol
  • Gold supported catalysts
  • Mesoporous metallosilicates
  • Oxidative esterification

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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