title: Effect of iron doping into CeO2-ZrO2 on the properties and catalytic behaviour of Pd-only three-way catalyst for automotive emission control.
abstract: Ce(0.67)Zr(0.33)O(2) doped with iron oxide was prepared and the corresponding Pd-only three-way catalysts were examined and characterized. Pd/CZFe(1%) catalyst exhibits the best catalytic performance for CO, HC, NO and NO(2) elimination and the widest operation window. The doping of iron oxide with 1% loading suggests the formation of more homogeneous Ce-Zr-Fe-O ternary solid solution, which seems to facilitate the reduction of Ce(4+)→Ce(3+) or the formation of oxygen vacancy and to promote the interaction between Ce-Zr and Fe. Moreover, the Ce redox behaviour for surface reduction suggests depending not only on the formation of homogeneous Ce-Zr-Fe-O but also on the surface property of the sample. The increase in the concentration of oxygen vacancies under all atmospheres for CZFe(1%) sample also results in the enhancement of oxygen storage complete capacity.
authors.affiliation: Institute of Catalysis, Zhejiang University, Hangzhou, PR China.
authors.forename: Guangfeng
authors.initials: G
authors.lastname: Li
authors.forename: Qiuyan
authors.initials: Q
authors.lastname: Wang
authors.forename: Bo
authors.initials: B
authors.lastname: Zhao
authors.forename: Meiqing
authors.initials: M
authors.lastname: Shen
authors.forename: Renxian
authors.initials: R
authors.lastname: Zhou
mesh_terms: D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D001335:Vehicle Emissions; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry*
chemical_list: D001335:Vehicle Emissions; D002563:Cerium; C030583:ceric oxide; D015040:Zirconium; D007501:Iron; C028541:zirconium oxide