Titanium niobate and titanium tantalate nanosheets as strong solid acid catalysts

Atsushi Takagaki, Takemi Yoshida, Darling Lu, Junko N. Kondo, Michikazu Hara, Kazunari Domen, Shigenobu Hayashi

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

HTiNbO5, HTi2NbO7, and HTiTaO5 nanosheets obtained by exfoliation of protonated cation-exchangeable layered metal oxides are examined as solid acids. These nanosheets exhibit high catalytic activity for esterification of acetic acid and hydrolysis of ethyl acetate, competing with niobic acid, Nb2O5·nH 2O. NH3 temperature-programmed desorption reveals that the acidity of the nanosheets corresponds to the density of strong acid sites of H-ZSM-5 or niobic acid. 1H magic-angle-spinning nuclear magnetic resonance spectroscopy suggests that bridging hydroxyl groups (Ti(OH)M) (M = Nb5+ or Ta5+)) on these titanium niobate/tantalate nanosheets function as strong Brønsted acid sites that are available for this reaction.

Original languageEnglish
Pages (from-to)11549-11555
Number of pages7
JournalJournal of Physical Chemistry B
Volume108
Issue number31
DOIs
Publication statusPublished - Aug 5 2004
Externally publishedYes

Fingerprint

Nanosheets
niobates
Titanium
titanium
catalysts
acids
Catalysts
Acids
Esterification
Magic angle spinning
Acetic Acid
Hydroxyl Radical
Oxides
magnetic resonance spectroscopy
Cations
Temperature programmed desorption
Hydrolysis
Magnetic Resonance Spectroscopy
acetic acid
Acidity

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Takagaki, A., Yoshida, T., Lu, D., Kondo, J. N., Hara, M., Domen, K., & Hayashi, S. (2004). Titanium niobate and titanium tantalate nanosheets as strong solid acid catalysts. Journal of Physical Chemistry B, 108(31), 11549-11555. https://doi.org/10.1021/jp049170e

Titanium niobate and titanium tantalate nanosheets as strong solid acid catalysts. / Takagaki, Atsushi; Yoshida, Takemi; Lu, Darling; Kondo, Junko N.; Hara, Michikazu; Domen, Kazunari; Hayashi, Shigenobu.

In: Journal of Physical Chemistry B, Vol. 108, No. 31, 05.08.2004, p. 11549-11555.

Research output: Contribution to journalArticle

Takagaki, A, Yoshida, T, Lu, D, Kondo, JN, Hara, M, Domen, K & Hayashi, S 2004, 'Titanium niobate and titanium tantalate nanosheets as strong solid acid catalysts', Journal of Physical Chemistry B, vol. 108, no. 31, pp. 11549-11555. https://doi.org/10.1021/jp049170e
Takagaki, Atsushi ; Yoshida, Takemi ; Lu, Darling ; Kondo, Junko N. ; Hara, Michikazu ; Domen, Kazunari ; Hayashi, Shigenobu. / Titanium niobate and titanium tantalate nanosheets as strong solid acid catalysts. In: Journal of Physical Chemistry B. 2004 ; Vol. 108, No. 31. pp. 11549-11555.
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