TY - JOUR
T1 - Metal oxide-catalyzed ammoxidation of alcohols to nitriles and promotion effect of gold nanoparticles for one-pot amide synthesis
AU - Ishida, Tamao
AU - Watanabe, Hiroto
AU - Takei, Takashi
AU - Hamasaki, Akiyuki
AU - Tokunaga, Makoto
AU - Haruta, Masatake
N1 - Funding Information:
This work was financially supported by JST-CREST and a Grant-in-Aid for Young Scientists (B) (No. 21750160 ) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
PY - 2012/5/28
Y1 - 2012/5/28
N2 - Transition metal oxides (MnO 2, Co 3O 4, and NiO) are catalytically active for the ammoxidation of alcohols to nitriles. In particular, MnO 2 exhibited remarkably high catalytic activity and selectivity for the ammoxidation of alcohols to produce nitriles. Benzyl alcohol could also be directly converted to benzonitrile by MnO 2 catalyst by the one-pot ammoxidation and the hydration with water which was formed by the first ammoxidation step. The deposition of gold nanoparticles (Au NPs) onto MnO 2 did not enhance the ammoxidation of benzyl alcohol but promoted the hydration of benzonitrile to produce benzamide with high selectivity. In contrast, Au NPs supported on Al 2O 3, CuO, and CeO 2 catalyzed the ammoxidation of benzyl alcohol, whereas these metal oxides themselves were inactive for the ammoxidation or showed low catalytic activity. These results have demonstrated that gold is intrinsically active as a catalyst for the ammoxidation of alcohols.
AB - Transition metal oxides (MnO 2, Co 3O 4, and NiO) are catalytically active for the ammoxidation of alcohols to nitriles. In particular, MnO 2 exhibited remarkably high catalytic activity and selectivity for the ammoxidation of alcohols to produce nitriles. Benzyl alcohol could also be directly converted to benzonitrile by MnO 2 catalyst by the one-pot ammoxidation and the hydration with water which was formed by the first ammoxidation step. The deposition of gold nanoparticles (Au NPs) onto MnO 2 did not enhance the ammoxidation of benzyl alcohol but promoted the hydration of benzonitrile to produce benzamide with high selectivity. In contrast, Au NPs supported on Al 2O 3, CuO, and CeO 2 catalyzed the ammoxidation of benzyl alcohol, whereas these metal oxides themselves were inactive for the ammoxidation or showed low catalytic activity. These results have demonstrated that gold is intrinsically active as a catalyst for the ammoxidation of alcohols.
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U2 - 10.1016/j.apcata.2012.03.006
DO - 10.1016/j.apcata.2012.03.006
M3 - Article
AN - SCOPUS:84859913128
SN - 0926-860X
VL - 425-426
SP - 85
EP - 90
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -