TY - JOUR
T1 - Layered and nanosheet tantalum molybdate as strong solid acid catalysts
AU - Tagusagawa, Caio
AU - Takagaki, Atsushi
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.
PY - 2010/3/22
Y1 - 2010/3/22
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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U2 - 10.1016/j.jcat.2009.12.019
DO - 10.1016/j.jcat.2009.12.019
M3 - Article
AN - SCOPUS:76749114271
SN - 0021-9517
VL - 270
SP - 206
EP - 212
JO - Journal of Catalysis
JF - Journal of Catalysis
IS - 1
ER -