Synthesis of mesoporous CeO2-MnOx binary oxides and their catalytic performances for CO oxidation

稀土学报(英文版), 2014, (2): 146-152. doi: 10.1016/S1002-0721(14)60044-2

詹望成 ^1, , 张欣烨 ^2, , 郭杨龙 ^3, , 王丽 ^4, , 郭耘 ^5, , 卢冠忠 ^6,

1.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

2.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

3.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

4.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

5.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

6.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

基金项目: National High Technology Re-search 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) National Basic Research Program of China(2010CB732300,2013CB933201)

Synthesis of mesoporous CeO2-MnOx binary oxides and their catalytic performances for CO oxidation

ZHAN Wangcheng ^1, , ZHANG Xinye ^2, , GUO Yanglong ^3, , WANG Li ^4, , GUO Yun ^5, , LU Guanzhong ^6,

1.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

2.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

3.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

4.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

5.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

6.Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

Keywords： mesoporous composite oxides

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 oC. 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-1 catalyst than other CeO2-MnOx catalysts.

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Synthesis of mesoporous CeO2-MnOx binary oxides and their catalytic performances for CO oxidation

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