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Hydrothermal Stability of Core–Shell [email protected]0.5Zr0.5O2/Al2O3 Catalyst for Automobile Three-Way Reaction
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1021/acscatal.8b00358 Lingcong Li , Ningqiang Zhang , Xing Huang , Ya Liu , Yaoyao Li , Guizhen Zhang , Liyun Song , Hong He 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1021/acscatal.8b00358 Lingcong Li , Ningqiang Zhang , Xing Huang , Ya Liu , Yaoyao Li , Guizhen Zhang , Liyun Song , Hong He 1
Affiliation
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In this paper, the hydrothermal stability and catalytic activity of [email protected]0.5Zr0.5O2/Al2O3 catalyst with a core–shell structure were investigated for automobile three-way reactions and compared with those of Pd/Al2O3, [email protected]2/Al2O3, and [email protected]2/Al2O3 catalysts. TEM, HRTEM, and EDS mapping analyses showed that the core–shell structure of [email protected]0.5Zr0.5O2 nanoparticles was intact after the hydrothermal treatment at 1050 °C for 5 h. Meanwhile, CO–DRIFT results suggested that the interface of Pd core and Ce0.5Zr0.5O2 shell acted as the active sites in the reaction of three-way catalysts. Additionally, XPS, FT-IR, and CO–DRIFT analyses demonstrated that a large amount of OH groups were present on the surface of [email protected]0.5Zr0.5O2/Al2O3 catalyst, which could accelerate the decomposition of carbonate species and reduce the activation energy of the catalytic reaction. This was an important reason for the [email protected]0.5Zr0.5O2/Al2O3 catalyst to keep the high catalytic activity after aging at high temperature.
中文翻译：
核壳结构的水热稳定性[电子邮件保护] 0.5 Zr 0.5 O 2 / Al 2 O 3汽车三效反应催化剂
本文研究了具有核-壳结构的[电子邮件保护] 0.5 Zr 0.5 O 2 / Al 2 O 3催化剂在汽车三效反应中的水热稳定性和催化活性，并将其与Pd / Al 2 O进行了比较。3，[受电子邮件保护的] 2 / Al 2 O 3和[受电子邮件保护的] 2 / Al 2 O 3催化剂。TEM，HRTEM和EDS映射分析表明，[受电子邮件保护的] 0.5 Zr 0.5 O 2的核-壳结构在1050°C水热处理5 h后，纳米颗粒保持完整。同时，CO-DRIFT结果表明，Pd核与Ce 0.5 Zr 0.5 O 2壳的界面是三元催化剂反应中的活性位。此外，XPS，FT-IR和CO-DRIFT分析表明，[受电子邮件保护的] 0.5 Zr 0.5 O 2 / Al 2 O 3催化剂表面存在大量的OH基，这可能会加速碳酸盐的分解。并降低催化反应的活化能。这是[受电子邮件保护] 0.5 Zr 0.5的重要原因O 2 / Al 2 O 3催化剂可保持高温老化后的高催化活性。
更新日期：2018-03-08
中文翻译：
核壳结构的水热稳定性[电子邮件保护] 0.5 Zr 0.5 O 2 / Al 2 O 3汽车三效反应催化剂
本文研究了具有核-壳结构的[电子邮件保护] 0.5 Zr 0.5 O 2 / Al 2 O 3催化剂在汽车三效反应中的水热稳定性和催化活性，并将其与Pd / Al 2 O进行了比较。3，[受电子邮件保护的] 2 / Al 2 O 3和[受电子邮件保护的] 2 / Al 2 O 3催化剂。TEM，HRTEM和EDS映射分析表明，[受电子邮件保护的] 0.5 Zr 0.5 O 2的核-壳结构在1050°C水热处理5 h后，纳米颗粒保持完整。同时，CO-DRIFT结果表明，Pd核与Ce 0.5 Zr 0.5 O 2壳的界面是三元催化剂反应中的活性位。此外，XPS，FT-IR和CO-DRIFT分析表明，[受电子邮件保护的] 0.5 Zr 0.5 O 2 / Al 2 O 3催化剂表面存在大量的OH基，这可能会加速碳酸盐的分解。并降低催化反应的活化能。这是[受电子邮件保护] 0.5 Zr 0.5的重要原因O 2 / Al 2 O 3催化剂可保持高温老化后的高催化活性。
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