TY - JOUR
T1 - Highly selective gas-phase oxidation of benzyl alcohol to benzaldehyde over silver-containing hexagonal mesoporous silica
AU - Jia, Lihua
AU - Zhang, Sen
AU - Gu, Fangna
AU - Ping, Yuan
AU - Guo, Xiangfeng
AU - Zhong, Ziyi
AU - Su, Fabing
N1 - Funding Information:
F. Su is grateful to the Chinese Academy of Sciences (Hundred Talents Program), National Natural Science Foundation of China (No. 21031005 ), and State Key Laboratory of Multiphase Complex Systems (IPE of CAS) for financial supports. L. Jia thanks for financial supports from Science foundation of Heilongjiang Province ( LC2009C09 ) and Key Program of Science and Technology of Qiqihaer, Heilongjiang Province ( GYGG-09010 ).
PY - 2012/2/1
Y1 - 2012/2/1
N2 - Silver-containing hexagonal mesoporous silica (Ag-HMS) catalysts with different Si/Ag ratios were synthesized by one-pot hydrothermal method for gas-phase selective oxidation of benzyl alcohol to benzaldehyde. The samples were characterized by nitrogen adsorption, X-ray diffraction, scanning electron micrograph, transmission electron micrograph, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectra. It was found that the Ag-HMS catalysts with different Ag loadings (0.55-3.50 wt.%) and different Ag particle sizes (5-32 nm) showed a similar level of catalytic property because they possess a similar Ag surface area. The Ag-HMS catalyst with a Ag loading of 2.81 wt.% exhibited excellent catalytic properties at 583 K with a high benzyl alcohol conversion of near 100%, benzaldehyde selectivity of around 96.0%, and benzaldehyde yield of about 96.0%, superior to those of other M-HMS catalysts (M = Co, Ce, La, Cu, Sr, Cd, Ni, Mn, V, and Fe). The enhanced catalytic performance could be attributed to the presence of the Ag surface oxygen species generated via oxygen spillover process. The work would be helpful for the development of novel Ag catalysts for selective oxidation of benzyl alcohol to obtain high quality of benzaldehyde and understanding the catalytic mechanism.
AB - Silver-containing hexagonal mesoporous silica (Ag-HMS) catalysts with different Si/Ag ratios were synthesized by one-pot hydrothermal method for gas-phase selective oxidation of benzyl alcohol to benzaldehyde. The samples were characterized by nitrogen adsorption, X-ray diffraction, scanning electron micrograph, transmission electron micrograph, X-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectra. It was found that the Ag-HMS catalysts with different Ag loadings (0.55-3.50 wt.%) and different Ag particle sizes (5-32 nm) showed a similar level of catalytic property because they possess a similar Ag surface area. The Ag-HMS catalyst with a Ag loading of 2.81 wt.% exhibited excellent catalytic properties at 583 K with a high benzyl alcohol conversion of near 100%, benzaldehyde selectivity of around 96.0%, and benzaldehyde yield of about 96.0%, superior to those of other M-HMS catalysts (M = Co, Ce, La, Cu, Sr, Cd, Ni, Mn, V, and Fe). The enhanced catalytic performance could be attributed to the presence of the Ag surface oxygen species generated via oxygen spillover process. The work would be helpful for the development of novel Ag catalysts for selective oxidation of benzyl alcohol to obtain high quality of benzaldehyde and understanding the catalytic mechanism.
KW - Benzaldehyde
KW - Benzyl alcohol oxidation
KW - Hexagonal mesoporous silica
KW - Selective oxidation
KW - Silver
UR - http://www.scopus.com/inward/record.url?scp=80053993128&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2011.08.009
DO - 10.1016/j.micromeso.2011.08.009
M3 - 文章
AN - SCOPUS:80053993128
SN - 1387-1811
VL - 149
SP - 158
EP - 165
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1
ER -