文献类型：期刊文献

中文题名：Synthesis of mesoporous CeO_2-MnO_x binary oxides and their catalytic performances for CO oxidation

英文题名：Synthesis of mesoporous CeO2-MnOx binary oxides and their catalytic performances for CO oxidation

作者：Zhan Wangcheng[1];Zhang Xinye[1];Guo Yanglong[1];Wang Li[1];Guo Yun[1];Lu Guanzhong[1]

机构：[1]E China Univ Sci & Technol, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：32

期号：2

起止页码：146

中文期刊名：Journal of Rare Earths

外文期刊名：JOURNAL OF RARE EARTHS

收录：CSTPCD;;EI(收录号：20141217494148);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000333004600007)】；CSCD:【CSCD2013_2014】；

基金：Project supported by National Basic Research Program of China (2010CB732300, 2013CB933201), National High Technology Research and Development Program of China (2011AA03A406, 2012AA062703), the National Natural Science Foundation of China (21103048, 21273150), Shu Guang Project of Shanghai Municipal Education Commission and Shanghai Education Development Foundation (10SG30)

语种：英文

中文关键词：mesoporous composite oxides; ceria; manganese oxide; hydrothermal synthesis; CO oxidation; rare earths

外文关键词：mesoporous composite oxides; ceria; manganese oxide; hydrothermal synthesis; CO oxidation; rare earths

摘要：Mesoporous CeO2-MnOx binary oxides with different Mn/Ce molar ratios were prepared by hydrothermal synthesis and characterized by scanning electron microscopy （SEM）, N2 sorption, X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and H2 temperature-programmed reduction （H2-TPR）. The characterization results indicated that the CeO2-MnOx catalysts exhibited flower-like microspheres with high specific surface areas, and partial Mn cations could be incorporated into CeO2 lattice to form solid solution. The CeO2-MnOx catalysts showed better catalytic activity for CO oxidation than that prepared by the coprecipitation method. Furthermore, the CeO2-MnOx catalyst with Mn/Ce molar ratio of 1 in the synthesis gel （Ce-Mn-1） exhibited the best catalytic activity, over which the conversion of CO could achieve 90% at 135 ℃. This was ascribed to presence of more Mn species with higher oxida- tion state on the surface and the better reducibility over the Ce-Mn-I catalyst than other CeO2-MnOx catalysts.
Mesoporous CeO2-MnOx binary oxides with different Mn/Ce molar ratios were prepared by hydrothermal synthesis and characterized by scanning electron microscopy (SEM), N-2 sorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and H-2 temperature-programmed reduction (H-2-TPR). The characterization results indicated that the CeO2-MnOx catalysts exhibited flower-like microspheres with high specific surface areas, and partial Mn cations could be incorporated into CeO2 lattice to form solid solution. The CeO2-MnOx catalysts showed better catalytic activity for CO oxidation than that prepared by the coprecipitation method. Furthermore, the CeO2-MnOx catalyst with Mn/Ce molar ratio of 1 in the synthesis gel (Ce-Mn-1) exhibited the best catalytic activity, over which the conversion of CO could achieve 90% at 135 degrees C. This was ascribed to presence of more Mn species with higher oxidation state on the surface and the better reducibility over the Ce-Mn-1 catalyst than other CeO2-MnOx catalysts.