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Impact of oxygen vacancy in CuO-ZnO catalysts on the selectivity of dimethyldichlorosilane monomer in the Rochow reaction
Jiang, Xingyu1,2,3; Ji, Yongjun4; Li, Jing3; Zhu, Yongxia3; Kang, Ting3; Zhong, Ziyi5,6; Su, Fabing2,3; Xu, Guangwen1,2
2021-03-01
Source PublicationMOLECULAR CATALYSIS
ISSN2468-8231
Volume504Pages:9
AbstractIn metal oxides, oxygen vacancies (O-V) are ubiquitous and intrinsic defects that can pronouncedly impact the physicochemical properties of the catalysts. In this work, we investigated the effect of the O-V concentration in CuO-based catalysts on the performance of the Rochow reaction. A series of foamed CuO-ZnO composite catalysts with a highly porous structure were synthesized by a facile co-precipitation method, followed by hydrogen reduction at different times. When used in the Rochow reaction to synthesize dimethyldichlomsilane (M2), the CuO-ZnO-20 catalyst with an appropriate O-V concentration exhibited the highest M2 selectivity at a similar Si conversion level of the other CuO-ZnO catalysts with different O-V concentrations. By correlating the structure and performance of the catalysts, we found that the O-V at an appropriate concentration in CuO-ZnO-20 acted as the adsorption sites for the reactant CH3Cl molecules, and generated an optimized electronic structure for surface CuO as confirmed by the X-ray photoelectron spectroscopy analysis (XPS), thereby optimizing the adsorption strength of CH3Cl and ultimately promoting the formation of alloyed CuxSi active phase. This work provides an effective strategy for designing heterogeneous catalysts with high selectivity by controlling the O-V concentration in the catalysts.
KeywordCuO-ZnO composites Foamed structure Rochow reaction Oxygen vacancies
DOI10.1016/j.mcat.2021.111453
Language英语
Funding ProjectNational Natural Science Foundation of China[21878301] ; National Natural Science Foundation of China[21978299] ; National Natural Science Foundation of China[21908224] ; Research Foundation for Advanced Talents of Beijing Technology and Business University[19008020159] ; Guangdong Key discipline fund for this collaboration
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Natural Science Foundation of China ; Research Foundation for Advanced Talents of Beijing Technology and Business University ; Guangdong Key discipline fund for this collaboration
WOS IDWOS:000632674700005
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48186
Collection中国科学院过程工程研究所
Corresponding AuthorJi, Yongjun; Su, Fabing; Xu, Guangwen
Affiliation1.Shenyang Univ Chem Technol, Key Lab Resources Chem & Mat, Minist Educ, Shenyang 110142, Peoples R China
2.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
4.Beijing Technol & Business Univ, Sch Light Ind, Beijing 100048, Peoples R China
5.Guangdong Technion Israel Inst Technol GTIIT, Coll Engn, 241 Daxue Rd, Shantou 515063, Peoples R China
6.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel
Recommended Citation
GB/T 7714
Jiang, Xingyu,Ji, Yongjun,Li, Jing,et al. Impact of oxygen vacancy in CuO-ZnO catalysts on the selectivity of dimethyldichlorosilane monomer in the Rochow reaction[J]. MOLECULAR CATALYSIS,2021,504:9.
APA Jiang, Xingyu.,Ji, Yongjun.,Li, Jing.,Zhu, Yongxia.,Kang, Ting.,...&Xu, Guangwen.(2021).Impact of oxygen vacancy in CuO-ZnO catalysts on the selectivity of dimethyldichlorosilane monomer in the Rochow reaction.MOLECULAR CATALYSIS,504,9.
MLA Jiang, Xingyu,et al."Impact of oxygen vacancy in CuO-ZnO catalysts on the selectivity of dimethyldichlorosilane monomer in the Rochow reaction".MOLECULAR CATALYSIS 504(2021):9.
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