Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis

doi:10.1039/c9nj05097c

	Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis
	Zhang, Min 1,2; Li, Weiman 1,2; Wu, Xiaofeng 1; Zhao, Feng 1; Wang, Dongdong 1,2; Zha, Xicuo 1,2; Li, Shuangde 1; Liu, Haidi 1; Chen, Yunfa 1,2,3
刊名	NEW JOURNAL OF CHEMISTRY
	2020-02-14
卷号	44 期号:6 页码:2442-2451
ISSN号	1144-0546
DOI	10.1039/c9nj05097c
英文摘要	A series of nanocrystalline copper-manganese oxides (denoted as Cu3-xMnx, x = 0, 1, 1.5, 2, 2.5, 3, where x means the molar ratio of Cu and Mn) were successfully prepared by a facile citric acid sol-gel method. The combination of Cu2+ and Mn3+ is intensified and enhanced interface effects generated, which is beneficial for the catalytic oxidation of benzene. A series of analyses, such as X-Ray Diffraction (XRD), N-2 adsorption-desorption, X-ray photoelectron spectroscopy (XPS), and hydrogen temperature programmed reduction (H-2-TPR), were employed to further investigate the structural properties of the catalysts. An optimal Mn/Cu ratio of 2 forms CuMn2O4 spinels. CuMn2 with CuMn2O4 spinel structure presents a larger specific surface area, smaller pore diameter as well as more lattice oxygen species, exhibiting remarkable activity and stability for the catalytic oxidation of benzene. On account of these factors, CuMn2 possesses better low temperature reducibility and shows the best catalytic performance with 90% benzene conversion at 186 degrees C. The enhanced catalytic activity of CuMn2 is attributed to the stabilization of CuMn2O4 active phases and the intensive synergistic effect between Cu-Mn oxides. To prove the effect of CuMn2O4 spinel structure on catalytic performance, a CuO/Mn2O3 mixed catalyst (molar ratio 1 : 1) was prepared and applied to benzene oxidation (T-90% = 198 degrees C), which indicates that the spinel structure has an encouraging effect on benzene catalysis. The catalytic properties of single copper oxide and manganese trioxide were also tested, the results show that CuMn2O4 has a crucial role in facilitating electronic transmission and mobility of the lattice oxygen.
资助项目	National Natural Science Foundation of China[51672273] ; Fund of State Key Laboratory of Multi-phase Complex Systems[MPCS-2019-A-01] ; National Key Research and Development Program of China[2018YFC0213404]
WOS关键词	SURFACE-AREA CUMN2O4 ; MIXED-OXIDE ; MANGANESE OXIDES ; CO OXIDATION ; REDUCTION ; SPINEL ; COPPER ; COPRECIPITATION ; SELECTIVITY ; COMBUSTION
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000514598200029
资助机构	National Natural Science Foundation of China ; Fund of State Key Laboratory of Multi-phase Complex Systems ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/39532]
专题	中国科学院过程工程研究所
通讯作者	Chen, Yunfa
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Min,Li, Weiman,Wu, Xiaofeng,et al. Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis[J]. NEW JOURNAL OF CHEMISTRY,2020,44(6):2442-2451.
APA	Zhang, Min.,Li, Weiman.,Wu, Xiaofeng.,Zhao, Feng.,Wang, Dongdong.,...&Chen, Yunfa.(2020).Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis.NEW JOURNAL OF CHEMISTRY,44(6),2442-2451.
MLA	Zhang, Min,et al."Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis".NEW JOURNAL OF CHEMISTRY 44.6(2020):2442-2451.