Design structure for CePr mixed oxide catalysts in soot combustion

Design structure for CePr mixed oxide catalysts in soot combustion
复制标题

CePr混合氧化物烟灰燃烧催化剂的设计结构

DOI:
10.1039/c6ra28722k
复制
发表时间:
2017-04
期刊:
影响因子:
3.9
通讯作者:
Lu Hanfeng
Lu Hanfeng
中科院分区:
化学3区
文献类型:
--
作者:
Fan Lijia;Xi Kang;Zhou Ying;Zhu Qiulian;Chen Yinfei;Lu Hanfeng

文献摘要

参考文献

被引文献

相似文献

采用固相研磨方法设计合成了四种不同结构的CePr混合氧化物:获得了Ce和Pr的均匀固溶体(CePr-NN)、Pr6O11包覆的CeO2(CePr-NO)、CeO2包覆的Pr6O11(CePr-ON)以及CeO2和Pr6O11的颗粒堆积(CePr-OO),并通过XRD、H2-TPR、TEM进行了表征。和TG。结果表明,CePr-NN在CePr催化剂中表现出最好的低温催化活性。 CeO2是CePr催化剂表面的主要活性相,使用Pr6O11作为骨架保持了CePr复合氧化物的热稳定性。此外,CeO2中掺入Pr后,催化剂的储氧能力和活性氧的迁移率均得到提高,从而提高了燃烧速率。以硝酸盐为前驱体制备过程中出现的“熔融态”对Ce和Pr的迁移起着重要作用,是形成不同固溶体结构或涂层结构的前提。
Four CePr mixed oxides with different structures were designed and synthesized using a solid-phase grinding method: a uniform solid solution of Ce and Pr (CePr-NN), Pr6O11-coated CeO2 (CePr-NO), CeO2-coated Pr6O11 (CePr-ON), and particle packing of CeO2 and Pr6O11 (CePr-OO) were obtained, and characterized by XRD, H2-TPR, TEM and TG. The results show that CePr-NN exhibits the best low temperature catalytic activity among the CePr catalysts. CeO2 is the major active phase on the surface of the CePr catalysts, and the use of Pr6O11 as the framework maintains the thermal stability of the CePr composite oxide. Moreover, both the oxygen storage capacity and mobility of the active oxygen of the catalyst were improved with the incorporation of Pr into CeO2, resulting in a higher combustion rate. The “molten state” which appeared during the preparation when nitrate was used as the precursor, plays a significant role in the migration of Ce and Pr, and is the premise of forming different structures of solid solution or coating structure.
DOI: 10.1016/j.cattod.2014.08.005
发表时间: 2015-05
期刊: Catalysis Today
影响因子: 5.3
作者:
Keizo Nakagawa;T. Ohshima;Y. Tezuka;Megumi Katayama;M. Katoh;S. Sugiyama
通讯作者: Keizo Nakagawa;T. Ohshima;Y. Tezuka;Megumi Katayama;M. Katoh;S. Sugiyama
DOI: 10.1007/bf01904437
发表时间: 1989-03
期刊: Journal of thermal analysis
影响因子: --
作者:
M. Karppinen;P. Kyläkoski;L. Niinistö;C. Rodellas
通讯作者: M. Karppinen;P. Kyläkoski;L. Niinistö;C. Rodellas
DOI: 10.1016/j.catcom.2006.06.016
发表时间: 2007-03
影响因子: 3.7
作者:
Jian Liu;Zhen Zhao;Chunming Xu;A. Duan;Lei Wang;Suojiang Zhang
通讯作者: Jian Liu;Zhen Zhao;Chunming Xu;A. Duan;Lei Wang;Suojiang Zhang
DOI: 10.1007/bf01913386
发表时间: 1988
期刊: Journal of thermal analysis
影响因子: --
作者:
A. Małecki;A. Malecka;R. Gajerski;B. Prochowska-Klisch;A. Podgórecka
通讯作者: A. Małecki;A. Malecka;R. Gajerski;B. Prochowska-Klisch;A. Podgórecka
DOI: 10.1016/j.cej.2014.10.055
发表时间: 2015-10-15
影响因子: 15.1
作者:
Miceli, P.;Bensaid, S.;Fino, D.
通讯作者: Fino, D.