title: Improved activity and durability of Rh-based three-way catalyst under diverse aging atmospheres by ZrO2support.
abstract: The catalytic activity and durability of Rh/ZrO2catalyst were investigated compared with Rh/Al2O3catalyst under diverse aging atmospheres, including lean, rich and lean-rich cyclic aging atmospheres, to simulate the real working conditions of three-way catalyst. Oxidation states and microstructures of rhodium species were investigated to correlate with the catalytic performance of the catalysts. The catalytic performance and durability of the Rh catalyst under diverse aging atmospheres were drastically enhanced by ZrO2support. ZrO2support was confirmed to be able to effectively inhibit rhodium sintering even under diverse aging conditions. It can also successfully keep Rh species in an active low-valence state on the surface of the catalyst. The superiority of ZrO2support compared to Al2O3was verified by the Rh-based monolith catalyst.
authors.affiliation: Key Laboratory of Advanced Materials, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. Electronic address: yidanlily@gmail.com.
authors.forename: Yidan
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Key Laboratory of Advanced Materials, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. Electronic address: ranr@tsinghua.edu.cn.
authors.forename: Rui
authors.initials: R
authors.lastname: Ran
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wu
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Baohuai
authors.initials: B
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Advanced Materials, Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China. Electronic address: duanweng@tsinghua.edu.cn.
authors.forename: Duan
authors.initials: D
authors.lastname: Weng
mesh_terms: D001272:Atmosphere; D002384:Catalysis; D008956:Models, Chemical; D010084:Oxidation-Reduction; D012238:Rhodium / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D012238:Rhodium; D015034:Zinc Oxide
keywords: Aging atmosphere, durability; Rhodium; Zirconia