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Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids
Gu, Qingqing; Ding, Yuxiao; Liu, Zigeng; Lin, Yangming; Schloegl, Robert; Heumann, Saskia; Su, Dangsheng
2019-05-01
Source PublicationJOURNAL OF ENERGY CHEMISTRY
ISSN2095-4956
Volume32Pages:131-137
AbstractA metal-free catalytic system combining oxidized carbon nanotubes (oCNTs) and ionic liquids (ILs) is presented for the oxidation of aromatic thiophene compounds with H2O2 as an oxidant. The oCNTs exhibit impressively high activity and stability in the system, which show an even better performance than those of some reported metal catalysts. The ILs are proved to have indispensable influence on the enhanced catalytic performance of the oCNTs. Detailed characterization by TG-MS and XPS demonstrates that the carbonyl groups are the active sites for the oxidation process, which is further supported by the deactivation and the model catalysts experiments. The quantitative analysis of different oxygen groups in oCNTs could be achieved by an isothermal temperature programmed TG-MS method. The concentration of carbonyl groups is 1.46 mmol per 1 g oCNTs and the turnover frequency of oCNTs could also be obtained (10.7 h(-1) in the presence of OmimPF(6)). H2O2 decomposition experiments combined with the EPR results reveal that the presence of OmimPF(6) can avoid the intermediate HO center dot to form O-2 and then improve the catalytic performance of oCNTs for the oxidation of dibenzothiophene. (c) 2018 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
KeywordCarbon nanotubes Metal-free catalysis Oxidative desulfurization Ionic liquids
Indexed BySCI
Language英语
WOS IDWOS:000473219200014
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81113
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Gu, Qingqing,Ding, Yuxiao,Liu, Zigeng,et al. Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids[J]. JOURNAL OF ENERGY CHEMISTRY,2019,32:131-137.
APA Gu, Qingqing.,Ding, Yuxiao.,Liu, Zigeng.,Lin, Yangming.,Schloegl, Robert.,...&Su, Dangsheng.(2019).Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids.JOURNAL OF ENERGY CHEMISTRY,32,131-137.
MLA Gu, Qingqing,et al."Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids".JOURNAL OF ENERGY CHEMISTRY 32(2019):131-137.
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