介孔Fe-Cu复合金属氧化物纳米粉催化剂催化低温CO氧化

doi:10.1016/S1872-2067(15)60922-6

催化学报 ›› 2015, Vol. 36 ›› Issue (10): 1711-1718.DOI: 10.1016/S1872-2067(15)60922-6

介孔Fe-Cu复合金属氧化物纳米粉催化剂催化低温CO氧化

EhsanAmini, Mehran Rezaei

喀山大学纳米科技研究所, 工程学院化工系催化剂与先进材料研究实验室, 喀山, 伊朗

收稿日期:2015-04-13 修回日期:2015-05-25 出版日期:2015-09-26 发布日期:2015-09-26
通讯作者: Mehran Rezaei.电话: +98-31-55912469; 传真: +98-31-55559930; 电子信箱: rezaei@kashanu.ac.ir

Preparation of mesoporous Fe-Cu mixed metal oxide nanopowder as active and stable catalyst for low-temperature CO oxidation

Ehsan Amini, Mehran Rezaei

Institute of Nanoscience and Nanotechnology, Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty ofEngineering, University of Kashan, Kashan, Iran

Received:2015-04-13 Revised:2015-05-25 Online:2015-09-26 Published:2015-09-26

摘要/Abstract

摘要：

以环氧丙烷为凝胶剂, 采用简便低廉的无表面活性剂的溶胶-凝胶法制备了一系列不同Cu/Fe摩尔比的高比表面积介孔Fe-Cu复合氧化物纳米粉末. 运用微反应器-色谱体系考察了它们在低温CO氧化反应中的催化性能. 采用X射线衍射、N₂吸附-脱附、热重-差热分析、程序升温还原、傅里叶变换红外光谱和透射电镜对所制样品进行了表征. 结果表明, 这些介孔Fe-Cu复合氧化物催化剂具有纳米晶结构、窄的孔径分布和高的比表面积, 在低温CO氧化反应中表现出高的活性和稳定性. CuO的添加影响了Fe₂O₃的结构和催化性能. 当CuO含量为15 mol%时, 催化剂具有最高的比表面积和催化活性, 在低温CO氧化反应中表现出较高的催化稳定性.

关键词: 氧化铁, 氧化铜, 金属氧化物催化剂, 介孔纳米粉, 一氧化碳氧化, 溶胶-凝胶法

Abstract:

A series of mesoporous Fe-Cu mixed metal oxide nanopowders with different Cu/Fe molar ratios and high specific surface areas were synthesized via a simple, inexpensive, surfactant-free sol-gel route using propylene oxide as the gelation agent. The catalytic behavior of the nanopowders in low-temperature CO oxidation was investigated using a microreactor-gas chromatography system. The prepared materials were characterized by X-ray diffraction, N₂ adsorption-desorption, thermogravimetric-differential thermal analysis, temperature-programmed reduction, Fourier transform infrared spectroscopy, and transmission electron microscopy. These mesoporous Fe-Cu mixed metal oxide catalysts had nanocrystalline structures, narrow pore size distributions, and high surface areas; they showed high catalytic activities and stabilities in low-temperature CO oxidation. The addition of CuO to iron oxide affected the structure and catalytic performance of the iron oxide. The catalyst containing 15 mol% CuO had the highest specific surface area and catalytic activity, and showed high catalytic stability in low-temperature CO oxidation.

Key words: Iron oxide, Copper oxide, Metal oxide catalyst, Mesoporous nanopowder, CO oxidation, Sol-gel method

EhsanAmini, Mehran Rezaei. 介孔Fe-Cu复合金属氧化物纳米粉催化剂催化低温CO氧化[J]. 催化学报, 2015, 36(10): 1711-1718.

Ehsan Amini, Mehran Rezaei. Preparation of mesoporous Fe-Cu mixed metal oxide nanopowder as active and stable catalyst for low-temperature CO oxidation[J]. Chinese Journal of Catalysis, 2015, 36(10): 1711-1718.

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介孔Fe-Cu复合金属氧化物纳米粉催化剂催化低温CO氧化

Preparation of mesoporous Fe-Cu mixed metal oxide nanopowder as active and stable catalyst for low-temperature CO oxidation

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