文献类型：期刊文献

中文题名：Realization approach of Pd-only three-way catalysts with high catalytic performance and thermal stability

英文题名：Realization approach of Pd-only three-way catalysts with high catalytic performance and thermal stability

作者：Yutao Ren[1];Qun Shen[1];Yun Guo[1];Yanqin Wang[1];Yanglong Guo[1];Xueqing Gong[1];Guanzhong Lu[1]

机构：[1]Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, East China University of Science and Technology

年份：2015

卷号：58

期号：1

起止页码：123

中文期刊名：Science China Chemistry

外文期刊名：中国科学（化学英文版）

收录：Scopus;CSCD:【CSCD2015_2016】；PubMed;

基金：financially supported by the National Basic Research Program of China(2010CB732300);the National Natural Science Foundation of China(21273150);the National High Technology Research and Development Program of China(2011AA03A406)

语种：英文

中文关键词：three-way catalyst; Pd-only catalyst; catalyst preparation; mixed surfactants; high thermal stability

外文关键词：三元催化剂;高热稳定性;催化性能;混合表面活性剂;钯;物理化学性质;操作窗口;吐温80

摘要：Pd-only three-way catalyst （TWC）, Pd supported on washcoating （the mixture of alumina and Ce-Zr solid solution）/cordierite, was prepared and its catalytic performance and the operation window （2-value） at 450 ℃ were evaluated with the simulated automotive exhaust feed gas. Surfactants such as Tween-80 and Span-20 were added in the process of preparing the catalyst in order to improve the thermal stability and catalytic performance of Pd-only TWC. The fresh and aged catalysts at 1000 ℃ for 4 h were characterized by low-temperature N2 adsorption, XRD, XPS, and H2-TPR techniques. The results show that the presence of surfactants in the synthesis slurry could influence the physicochemical properties of the final Pd-only TWC. The FTS catalyst prepared with the mixed surfactant of Tween-80 and Span-20 exhibited excellent three-way catalytic performance. After being aged at 1000℃ for 4 h, the catalytic performances of Pd-only TWCs slightly decreased, but the FTS catalyst still demonstrated higher catalytic performance and better thermal stability compared with the Pd-only catalysts prepared with single surfactant or without any surfactant. And the FTS catalyst has a wider 2 value （operation window） than other catalysts, even after being aged at 1000℃.
Pd-only three-way catalyst(TWC),Pd supported on washcoating(the mixture of alumina and Ce-Zr solid solution)/cordierite,was prepared and its catalytic performance and the operation window(λ-value)at 450°C were evaluated with the simulated automotive exhaust feed gas.Surfactants such as Tween-80 and Span-20 were added in the process of preparing the catalyst in order to improve the thermal stability and catalytic performance of Pd-only TWC.The fresh and aged catalysts at 1000°C for4 h were characterized by low-temperature N2 adsorption,XRD,XPS,and H2-TPR techniques.The results show that the presence of surfactants in the synthesis slurry could influence the physicochemical properties of the final Pd-only TWC.The FTS catalyst prepared with the mixed surfactant of Tween-80 and Span-20 exhibited excellent three-way catalytic performance.After being aged at 1000°C for 4 h,the catalytic performances of Pd-only TWCs slightly decreased,but the FTS catalyst still demonstrated higher catalytic performance and better thermal stability compared with the Pd-only catalysts prepared with single surfactant or without any surfactant.And the FTS catalyst has a widerλvalue(operation window)than other catalysts,even after being aged at 1000°C.