A series of 12-molybdophosphoric acid (MPA) supported on V2O5 dispersed γ-Al2O3 catalysts with different vanadia loadings were prepared by impregnation and characterized by N2 adsorption-desorption, X-ray diffraction...A series of 12-molybdophosphoric acid (MPA) supported on V2O5 dispersed γ-Al2O3 catalysts with different vanadia loadings were prepared by impregnation and characterized by N2 adsorption-desorption, X-ray diffraction, temperature-programmed reduction, in situ laser Raman spectroscopy, UV-Vis diffused reflectance spectroscopy, scanning electron microscopy, and temperature-programmed desorption of NH3 techniques. Their catalytic activities were evaluated for the vapor phase aerobic oxidation of benzyl alcohol. The catalysts exhibited high catalytic activity and the conversion of benzyl alcohol depended on the vanadia content while the catalyst with 15 wt% V2O5 content showed optimum activity. The characterization results suggest the presence of well-dispersed V2O5 and partially disintegrated Keggin ions of MPA on the support. In situ Raman studies showed a reduced Mo(IV) species when the catalysts were calcined at high temperatures. The high oxidation activity of the catalysts is related to the synergistic effect between MPA and V2O5.展开更多
基金supported by the Department of Science & Technology, New Delhi under SERC scheme, DST No. SR/S1/PC-40/2006
文摘A series of 12-molybdophosphoric acid (MPA) supported on V2O5 dispersed γ-Al2O3 catalysts with different vanadia loadings were prepared by impregnation and characterized by N2 adsorption-desorption, X-ray diffraction, temperature-programmed reduction, in situ laser Raman spectroscopy, UV-Vis diffused reflectance spectroscopy, scanning electron microscopy, and temperature-programmed desorption of NH3 techniques. Their catalytic activities were evaluated for the vapor phase aerobic oxidation of benzyl alcohol. The catalysts exhibited high catalytic activity and the conversion of benzyl alcohol depended on the vanadia content while the catalyst with 15 wt% V2O5 content showed optimum activity. The characterization results suggest the presence of well-dispersed V2O5 and partially disintegrated Keggin ions of MPA on the support. In situ Raman studies showed a reduced Mo(IV) species when the catalysts were calcined at high temperatures. The high oxidation activity of the catalysts is related to the synergistic effect between MPA and V2O5.
基金financially supported by the Key Science & Technology Specific Projects of Yangzhou, Jiangsu Province of China (YZ2010024)the Key Science & Technology Specific Projects of Guangxi Province of China (11107021-3-1)+1 种基金the Scientific Research Project of Guangxi Education Department (201010LX186)the Doctoral Foundation of Guilin University of Technology (002401003321)~~
基金supported by the National Natural Science Foundation of China (51372137)the National High Technology Research and Development Program of China (863 Program,2015AA034603)~~
基金supported by the National Natural Science Foundation of China(21107096)the Zhejiang Provincial Natural Science Foundation of China(LY14E080008)the Commission of Science and Technology of Zhejiang Province(2013C03021)~~
基金supported by the National High Technology Research and Development Program of China(863 Program,2013AA065302)the Key Laboratory of Solid Waste Reuse for Building Materials(SWR-2013-003)~~
基金Supported by the National Basic Research Program of China (973 Program,2006CB806103)the National Natural Science Foundation of China (20773027,20633030)the Shanghai Research Institute of Petrochemical Technology,and the Science and Technology Commission of Shanghai Municipality (08DZ2270500)
