Layered and nanosheet tantalum molybdate as strong solid acid catalysts

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

doi:10.1016/j.jcat.2009.12.019

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 journal › Article › peer-review

47 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 language	English (US)
Pages (from-to)	206-212
Number of pages	7
Journal	Journal of Catalysis
Volume	270
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2009.12.019
State	Published - Mar 22 2010
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Development in a New Interdisciplinary Field Based on Nanotechnology and Materials Science program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan and the Global Center of Excellence Program for Chemistry.

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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10.1016/j.jcat.2009.12.019

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title = "Layered and nanosheet tantalum molybdate as strong solid acid catalysts",

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.",

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author = "Caio Tagusagawa and Atsushi Takagaki and Kazuhiro Takanabe and Kohki Ebitani and Shigenobu Hayashi and Kazunari Domen",

note = "Funding Information: This work was supported by the Development in a New Interdisciplinary Field Based on Nanotechnology and Materials Science program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan and the Global Center of Excellence Program for Chemistry.",

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AU - Takanabe, Kazuhiro

AU - Ebitani, Kohki

AU - Hayashi, Shigenobu

AU - Domen, Kazunari

N1 - Funding Information: This work was supported by the Development in a New Interdisciplinary Field Based on Nanotechnology and Materials Science program of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan and the Global Center of Excellence Program for Chemistry.

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N2 - 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.

AB - 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.

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Layered and nanosheet tantalum molybdate as strong solid acid catalysts

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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