Novel PtCuO/CeO2/α-Al2O3 sponge catalysts for the preferential oxidation of CO (PROX) prepared by means of supercritical fluid reactive deposition (SFRD)

Novel PtCuO/CeO2/α-Al2O3 sponge catalysts for the preferential oxidation of CO (PROX) prepared by means of supercritical fluid reactive deposition (SFRD)
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超临界流体反应沉积(SFRD)制备的新型 PtCuO/CeO2/α-Al2O3 海绵催化剂用于 CO 优先氧化(PROX)

DOI:
10.1016/j.jcat.2011.10.017
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发表时间:
2012
影响因子:
7.3
通讯作者:
B. Kraushaar-Czarnetzki
B. Kraushaar-Czarnetzki
中科院分区:
化学1区
文献类型:
--
作者:
S. Lang;M. Türk;B. Kraushaar-Czarnetzki

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在过量氢存在下,测试了负载氧化铈涂层和不同组成的PtCuO层的陶瓷海绵(α-氧化铝)在CO的优先氧化(PROX)中的性能。通过超临界流体反应沉积(SFRD),其中包括吸附和还原溶解在超临界CO2中的金属-有机络合物,同时负载在二氧化铈涂覆的海绵上的铜和铂。采用SEM、STEM、HAADF、EDX、H2-TPR、CO-TPD、CO2-TPD和N2吸附等手段对产物进行了表征。在SFRD方法之后制备的催化剂表现出高选择性。CO氧化活性大致与铜含量相关,并且与迄今文献中报道的PROX催化剂的活性相比是上级的。
Ceramic sponges (α-alumina) supporting ceria wash-coats and PtCuO layers of varying compositions were tested in the preferential oxidation (PROX) of CO in the presence of excess hydrogen. Copper and platinum were loaded simultaneously on the ceria-coated sponge by means of supercritical fluid reactive deposition (SFRD) which includes adsorption and reduction of metal-organic complexes dissolved in supercritical CO2. Products were characterized by means of SEM, STEM HAADF, EDX, H2-TPR, CO-TPD, CO2-TPD and N2-adsorption. Catalysts prepared after the SFRD-method exhibit high selectivity. The CO oxidation activity roughly correlates with the copper content and is superior as compared to the activity of PROX-catalysts reported in the literature so far.
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发表时间: 2002-10
期刊: Catalysis Letters
影响因子: 2.8
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