title: MnOx-CeO2-Al2O3 mixed oxides for soot oxidation: activity and thermal stability.
abstract: MnO(x)-CeO(2)-Al(2)O(3) mixed oxides were prepared by impregnating manganese acetate and cerium nitrate on alumina powders using the sol-gel method. The thermal stabilities of MnO(x)-CeO(2) and Al(2)O(3)-modified mixed oxides were evaluated by treating at 800 °C in dry air flow for 20h. The introduction of Al(2)O(3) markedly increases the textural stability of the catalyst with a relatively high dispersion of MnO(x) and CeO(2), remaining a strong synergistic effect between these two oxides. The NO oxidation activity of the ternary oxides experiences a smaller loss after high-temperature calcination, and a low soot oxidation temperature is attained in the presence of NO.
authors.affiliation: Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. wuxiaodong@tsinghua.edu.cn
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wu
authors.forename: Shuang
authors.initials: S
authors.lastname: Liu
authors.forename: Duan
authors.initials: D
authors.lastname: Weng
authors.forename: Fan
authors.initials: F
authors.lastname: Lin
authors.forename: Rui
authors.initials: R
authors.lastname: Ran
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D053260:Soot / Q000737:chemistry*; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D017895:Manganese Compounds; D010087:Oxides; D053260:Soot; D002563:Cerium; C030583:ceric oxide; C027424:manganese oxide; D000537:Aluminum Oxide