| CuO/Al2O3、CuO/CeO2-Al2O3和CuO/La2O3-Al2O3催化剂中CuO物种被CO氧化的比较 |
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| 引用本文： | 金凌云,何迈,鲁继青,罗孟飞,方萍,谢云龙.CuO/Al2O3、CuO/CeO2-Al2O3和CuO/La2O3-Al2O3催化剂中CuO物种被CO氧化的比较[J].化学物理学报,2007,20(5):582-586. |
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| 作者姓名： | 金凌云 何迈 鲁继青 罗孟飞 方萍 谢云龙 |
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| 作者单位： | 浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004,浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004,浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004,浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004,浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004,浙江师范大学物理化学研究所，浙江省固体表面反应化学重点实验室，金华321004 |
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| 基金项目： | the National Natural
Science Foundation of China (No.20473075) |
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| 摘 要： | 用浸渍法制备了CuO/Al2O3 (Cu/Al)、CuO/CeO2-
Al2O3 (Cu/CeAl)和CuO/La2O3-Al2O3(Cu/LaAl)催化剂. 通过原位XRD、Raman和H2-TPR方法， 对催化剂中的CuO物种以及CuO-Al2O3的固-固相反应进行了表征. 结果表明，对于Cu/Al催化剂，CuAl2O4存在于CuO与Al2O3层之间，CuO以高分散和晶相两种相态存在于催化剂的表层；对于Cu/CeAl催化剂，除了少量高分散和晶相的CuO存在于表层外，大部分CuO迁移到了CeO2的内层，
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| 关 键 词： | CuO/Al2O3，CuO/CeO2-Al2O3，CuO/La2O3-Al2O3，原位XRD，Raman，TPR |
| 收稿时间： | 2007/1/25 0:00:00 |
| 修稿时间： | 4/4/2007 12:00:00 AM |
Comparative Study of CuO Species on CuO/Al2O3, CuO/CeO-Al2O3 and
CuO/La2O-Al2O3 Catalysts for CO Oxidation |
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| Ling-yun Jin,Mai He,Ji-qing Lu,Meng-fei Luo,Ping Fang and Yun-long Xie.Comparative Study of CuO Species on CuO/Al2O3, CuO/CeO-Al2O3 and
CuO/La2O-Al2O3 Catalysts for CO Oxidation[J].Chinese Journal of Chemical Physics,2007,20(5):582-586. |
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| Authors: | Ling-yun Jin Mai He Ji-qing Lu Meng-fei Luo Ping Fang and Yun-long Xie |
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| Institution: | Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China,Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China,Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China,Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China,Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China,Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China |
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| Abstract: | CuO/Al2O3, CuO/CeO2-Al2O3, and CuO/La2O3-Al2O3 (denoted as Cu/Al, Cu/CeAl, and Cu/LaAl) catalysts were prepared by an impregnation method. CuO species and CuO/Al2O3 thermal solid-solid interaction were characterized by in situ XRD, Raman spectroscopy and H2-TPR techniques. For the Cu/Al catalyst, a CuAl2O4 phase exists between the CuO and Al2O3 layer and the CuO phase exists on the surface in both highly dispersed and bulk forms. For the Cu/CeAl catalyst, there is highly dispersed and bulk CuO on the surface, but most of the CuO has transferred into the internal layer of CeO2 as bulk CuO and CuAl2O4. For the Cu/LaAl catalyst, only bulk CuO is present on the surface of the catalyst and no CuAl2O4 is formed. The catalytic activity order for CO oxidation is Cu/CeAl>Cu/Al>Cu/LaAl. The highly dispersed CuO on the catalyst surface may be the active phase for CO oxidation. The results show that the addition of CeO2 not only promotes both the transference of CuO and the formation of CuAl2O4 but also favors the CO oxidation due to the association of highly dispersed CuO with CeO2, while La2O3 hinders the transference of CuO and the formation of CuAl2O4. |
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| Keywords: | CuO/Al2O3 CuO/CeO2-Al2O3 CuO/La2O3-Al2O3 in situ XRD Raman TPR |
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