Characterization and catalytic performance of Cu/CeO2 and Cu/MgO-CeO2 catalysts for NO reduction by CO
Characterization and catalytic performance of Cu/CeO2 and Cu/MgO-CeO2 catalysts for NO reduction by CO
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Cu/CeO2 和 Cu/MgO-CeO2 催化剂 CO 还原 NO 的表征和催化性能
DOI：
10.1016/j.apcata.2009.05.017
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发表时间：
2009-07
期刊：
影响因子：
--
通讯作者：
Lin, Xingyi
中科院分区：
文献类型：
--
作者：
Zhu, Junjiang;Zhan, Yingying;Wei, Kemei;Zheng, Qi;Cai, Guohui;Chen, Jinfa;Lin, Xingyi
分别采用柠檬酸溶胶-凝胶法和浸渍法制备了CeO 2负载Cu和CeO 2-MgO催化剂，并将其用于CO还原NO反应。XRD、TPR和EPR测试结果表明，Mg的加入不仅促进了CuO的分散，而且促进了Cu离子在CeO 2基体中的掺杂。氧化还原处理有利于CeO 2八面体位置上的部分铜离子取代Ce 4+的晶格位置。结合活性测试结果，我们发现铜取代的Cu-O-Ce固溶体的形成促进了催化剂的催化活性。并借助TEM、TGA和XRD等技术研究了MgO对CuO分散和Cu-O-Ce固溶体形成的影响。研究结果表明，在Cu/MgO-CeO 2的制备过程中，氧化镁微晶发生了相转变，导致了载体的重构，从而提高了Cu的分散度、比表面积、孔容，并使Cu离子掺杂到CeO 2基体中。
Copper supported on ceria and ceria-magnesia catalysts were synthesized and used for NO reduction by CO. The supports and the subsequent Cu catalysts were prepared by citric acid sol–gel and impregnation methods, respectively. Based on XRD, TPR and EPR measurements, it is found that the Mg addition promotes not only the dispersion of CuO, but also the doping of copper ions into CeO2matrix. A redox treatment favors some of copper ions in the octahedral sites of CeO2substituting the lattice sites of Ce4+. Combining the results of activity test, we found that the formation of copper-substituted Cu-O-Ce solid solution promotes the catalytic activity of the catalysts. Also, the ways that MgO acts on the dispersion of CuO and the formation of Cu-O-Ce solid solutions were investigated with the aid of TEM, TGA and XRD techniques. The results of these studies suggest that magnesia crystallites undergo a phase evolvement during the preparation process of Cu/MgO-CeO2, leading to the reconstitution of the support and hence the improvement of copper dispersion, BET surface area, pore volume, as well as the doping of copper ions into the CeO2matrix.
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影响因子：
7.3
作者：
D. Chambers;D. Angove;N. W. Cant
通讯作者：
D. Chambers;D. Angove;N. W. Cant
影响因子：
7.3
作者：
N. Mizuno;M. Yamato;Mika Tanaka;M. Misono
通讯作者：
N. Mizuno;M. Yamato;Mika Tanaka;M. Misono
影响因子：
7.3
作者：
M. Fernández-García;E. Rebollo;A. G. Ruiz;J. Conesa;J. Soria
通讯作者：
M. Fernández-García;E. Rebollo;A. G. Ruiz;J. Conesa;J. Soria
DOI：
10.1016/0927-7757(96)03655-2
发表时间：
1996-08
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
A. Aboukaïs;A. Bennani;Carole Lamonier-Dulongpont;E. Abi-aad;G. Wrobel
通讯作者：
A. Aboukaïs;A. Bennani;Carole Lamonier-Dulongpont;E. Abi-aad;G. Wrobel
影响因子：
8.6
作者：
A. Aboukaïs;A. Bennani;C. Aissi;M. Guelton;J. Védrine
通讯作者：
A. Aboukaïs;A. Bennani;C. Aissi;M. Guelton;J. Védrine