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刘俊华副教授课题组在APPLIED CATALYSIS A-GENERAL发表研究论文

发布时间:17-05-11 14:49:16 文章来源:化科院 浏览次数: [ 字号:


Aerobic oxidation of alcohols over Ru-Mn-Ce and Ru-Co-Ce catalysts: The effect of calcination temperature
Liu, G (Liu, Gui)[ 1 ] ; Liu, JH (Liu, Junhua)[ 1,2 ]*(刘俊华); Li, WX (Li, Wenxiu)[ 1 ] ; Liu, C (Liu, Cheng)[ 1 ] ; Wang, F (Wang, Fang)[ 3 ]*; He, JK (He, Junkai)[ 4 ] ; Guild, C (Guild, Curtis)[ 4 ] ; Jin, J (Jin, Jing)[ 4 ] ; Kriz, D (Kriz, David)[ 4 ] ; Miao, R (Miao, Ran)[ 4 ] ; Suib, SL (Suib, Steven L.)[ 4 ]*

[ 1 ] Nanjing Normal Univ, Coll Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China
[ 2 ] Nanjing Normal Univ, Coll Chem & Mat Sci, Jiangsu Key Lab Biomed Mat, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Nanjing 210023, Jiangsu, Peoples R China
[ 3 ] Nanjing Tech Univ, Coll Chem & Mol Engn, Nanjing 210009, Jiangsu, Peoples R China
[ 4 ] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA

APPLIED CATALYSIS A-GENERAL,201704,535,77-84

Two ternary mixed oxides, Ru-Mn-Ce and Ru-Co-Ce, were prepared by a co-precipitation method and used in the aerobic oxidation of alcohols to corresponding aldehydes (ketones). Interestingly, different catalytic resifts were obtained when these compounds were calcined. The calcination temperature had an adverse effect on the catalytic performance of Ru-Mn-Ce catalysts, while being beneficial to the Ru-Co-Ce catalysts. To illustrate these effects, these materials were characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Temperature-programmed reduction (TPR), Electron paramagnetic resonance (EPR) and other techniques. The data showed that ruthenium oxides were uniformly dispersed in the mixed oxides, and phase transformations occur after calcination. Mn3O4 was transformed to MnO2 for the Ru-Mn-Ce catalyst, wfiile CoO(OH) was transformed to Co3O4 in the Ru-Co-Ce catalyst. The interactions between ruthenium oxides and Co (Mn)-Ce mixed oxides of the former strengthened while the latter weakened. Calcination decreased the content of adsorbed oxygen and restricted oxygen transfer mechanism in the manganese system, while the opposite effect was observed with the cobalt-containing catalyst. Under optimal reaction conditions, various kinds of alcohols were transformed to corresponding aldehydes (ketones) in high yields over the Ru-Mn-Ce catalyst suggesting these ternary oxides are environmental friendly and economical catalytic systems.

文章链接:
http://www.sciencedirect.com/science/article/pii/S0926860X17300510
 


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