CAS OpenIR
Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis
Zhang, Min1,2; Li, Weiman1,2; Wu, Xiaofeng1; Zhao, Feng1; Wang, Dongdong1,2; Zha, Xicuo1,2; Li, Shuangde1; Liu, Haidi1; Chen, Yunfa1,2,3
2020-02-14
Source PublicationNEW JOURNAL OF CHEMISTRY
ISSN1144-0546
Volume44Issue:6Pages:2442-2451
AbstractA 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.
DOI10.1039/c9nj05097c
Language英语
WOS KeywordSURFACE-AREA CUMN2O4 ; MIXED-OXIDE ; MANGANESE OXIDES ; CO OXIDATION ; REDUCTION ; SPINEL ; COPPER ; COPRECIPITATION ; SELECTIVITY ; COMBUSTION
Funding ProjectNational 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 Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; Fund of State Key Laboratory of Multi-phase Complex Systems ; National Key Research and Development Program of China
WOS IDWOS:000514598200029
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/39533
Collection中国科学院过程工程研究所
Corresponding AuthorChen, Yunfa
Affiliation1.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
Recommended Citation
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.
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