Layered and nanosheet tantalum molybdate as strong solid acid catalysts

Caio Tagusagawa, Atsushi Takagaki, Kazuhiro Takanabe, Kohki Ebitani, Shigenobu Hayashi, Kazunari Domen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Layered and nanosheet aggregates of HTaMoO6 were examined as solid acid catalysts. The HTaMoO6 aggregated nanosheets were formed by soft chemical processing of layered HTaMoO6 using tetra (n-butylammonium) hydroxide. The catalytic activity and acid properties of the HTaMoO6 compounds were compared with those of layered HNbMoO6 and a range of conventional solid acids. The catalytic activity of HTaMoO6 for Friedel-Crafts alkylation with benzyl alcohol, hydrolysis of disaccharides, and esterification of acetic acid and lactic acid increased after exfoliation and aggregation, consistent with the acid strengths determined by NH3 temperature-programmed desorption and 31P magic-angle spinning nuclear magnetic resonance spectroscopy measurements. HTaMoO6 nanosheets possess additional strong acid sites on the oxide formed by exposure of a single layer, along with strong acid sites within the interlayer of the layered aggregate structure, resulting in higher acid catalytic activity than that of the original layered oxide.

Original languageEnglish (US)
Pages (from-to)206-212
Number of pages7
JournalJournal of Catalysis
Volume270
Issue number1
DOIs
StatePublished - Mar 22 2010

Keywords

  • Friedel-Crafts alkylation
  • Hydrolysis
  • Layered metal oxides
  • NH temperature-programmed desorption
  • Nanosheets
  • P magic-angle spinning nuclear magnetic resonance spectroscopy
  • Solid acid

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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