中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 过程工程研究所
  3. 中国科学院过程工程研究所
Low-temperature catalytic oxidation of benzene over nanocrystalline Cu-Mn composite oxides by facile sol-gel synthesis

文献类型：期刊论文

作者Zhang, Min1,2; Li, Weiman1,2; Wu, Xiaofeng1; Zhao, Feng1; Wang, Dongdong1,2; Zha, Xicuo1,2; Li, Shuangde1; Liu, Haidi1; Chen, Yunfa1,2,3
刊名NEW JOURNAL OF CHEMISTRY
出版日期2020-02-14
卷号44期号:6页码:2442-2451
ISSN号1144-0546
DOI10.1039/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.
WOS关键词SURFACE-AREA CUMN2O4 ; MIXED-OXIDE ; MANGANESE OXIDES ; CO OXIDATION ; REDUCTION ; SPINEL ; COPPER ; COPRECIPITATION ; SELECTIVITY ; COMBUSTION
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研究方向Chemistry
语种英语
WOS记录号WOS:000514598200029
出版者ROYAL SOC CHEMISTRY
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
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.

入库方式： OAI收割

来源：过程工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。