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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >The preparation and catalytic behavior of copper-cerium oxide catalysts for low-temperature carbon monoxide oxidation
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The preparation and catalytic behavior of copper-cerium oxide catalysts for low-temperature carbon monoxide oxidation

机译：低温氧化一氧化碳铜铈氧化物催化剂的制备及催化性能

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CeO2 nano-crystals were synthesized by a sol-gel process and then used as support for CuO/CeO2 (sol-gel) catalysts prepared via impregnation method. For comparison, the commercial CeO2 was also used as a support for CuO/CeO2 (commercial) catalysts prepared via the same method. The samples were characterized by means of BET, XRD, UV-vis, TPR and XPS. The catalytic properties of the CuO/CeO2 catalysts for low-temperature CO oxidation were studied by using a microreactor-GC system. The prepared spherical CeO2 nano-crystals have much smaller particle size, better crystallinity and larger surface area than the commercial CeO2, XPS analysis indicated the presence of reduced copper species in the CuO/CeO2 catalysts. TPR showed that there are different copper species in the catalysts. The influence of calcination time, temperature and CuO loadings on the catalytic activity of CuO/CeO2 catalysts has been studied. The CuO/CeO2 (sol-gel) catalysts exhibited higher catalytic activity than the CuO/CeO2 (commercial) catalysts. Compared with CuO/CeO2 catalysts prepared via other techniques, our catalysts exhibited similar or even better catalytic performance. (c) 2005 Elsevier B.V. All rights reserved.
机译：通过溶胶-凝胶法合成了CeO2纳米晶体，然后将其用作通过浸渍法制备的CuO / CeO2（溶胶-凝胶）催化剂的载体。为了进行比较，商用CeO2还用作通过相同方法制备的CuO / CeO2（商业）催化剂的载体。通过BET，XRD，UV-vis，TPR和XPS对样品进行表征。利用微型反应器-气相色谱系统研究了CuO / CeO2催化剂对低温CO氧化的催化性能。制备的球形CeO2纳米晶体比市售CeO2具有更小的粒径，更好的结晶度和更大的表面积，XPS分析表明在CuO / CeO2催化剂中存在还原的铜物种。 TPR表明催化剂中存在不同的铜种类。研究了煅烧时间，温度和CuO负载量对CuO / CeO2催化剂催化活性的影响。 CuO / CeO2（溶胶-凝胶）催化剂显示出比CuO / CeO2（商业）催化剂更高的催化活性。与通过其他技术制备的CuO / CeO2催化剂相比，我们的催化剂表现出相似甚至更好的催化性能。 （c）2005 Elsevier B.V.保留所有权利。

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