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Approach to generating the right active phase in the "Direct" synthesis of trimethoxysilanes using the CuCl-Cu2O catalyst
Su, Kai1,2; Ji, Yongjun3; Zhou, Xiwen1; Jiang, Xingyu1,4; Li, Huifang1; Zhu, Yongxia1; Li, Jing1; Liu, Hezhi1; Xiao, Junping5; Zhong, Ziyi6,7; Su, Fabing1,4
2021-04-01
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume544Pages:8
Abstract

The "direct" synthesis of trimethoxysilane (M3) by the reaction of Si with methanol over the Cud catalyst often generates a large amount of erosive HCl gas, causing severe environmental pollution. Thus, it calls for the development of greener and more efficient composite catalysts. In this work, to reduce the amount of CuCl, we employed three pretreatment methods to activate the contact mass of Si powder and the composite catalyst of CuCl and Cu2O. It was found that the contact mass activated by argon (Ar), hydrogen argon (H-2/Ar) and methyl chloride (CH3Cl), respectively, exhibited different catalytic performances: the highest Si conversion (34.1%) and M3 yield (24.0%) were obtained on the sample activated by CH3Cl. Notably, the M3 yield was increased 8-fold than that of the un-activated sample. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) studies revealed that different activation methods led to the generation of different kinds of CuxSi phases, such as Cu3Si and Cu4Si, both of which gradually transformed into Cu15Si4 during the reaction process. Pretreatment of the contact mass with CH3Cl promoted the formation of CuxSi, which contributed to the generation of more Cu15Si4 active phase, and finally to the superior catalytic performance.

KeywordTrimethoxysilane Composite Catalyst Pretreatment Catalytic Performance Active Phase
DOI10.1016/j.apsusc.2020.148915
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]
WOS Research AreaChemistry ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
Funding OrganizationNational Natural Science Foundation of China ; Research Foundation for Advanced Talents of Beijing Technology and Business University
WOS IDWOS:000618286300003
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/43662
Collection中国科学院过程工程研究所
Corresponding AuthorJi, Yongjun; Zhong, Ziyi; Su, Fabing
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Beijing Technol & Business Univ, Sch Light Ind, Beijing 100048, Peoples R China
4.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China
5.Hubei Bluesky New Mat Inc, R&D Dept, 8 Dev Ave,Chem Ind Pk, Xiantao 433000, Hubei, Peoples R China
6.Guangdong Technion Israel Inst Technol GTIIT, Coll Engn, 241 Da Xue Rd, Shantou 515063, Peoples R China
7.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel
Recommended Citation
GB/T 7714
Su, Kai,Ji, Yongjun,Zhou, Xiwen,et al. Approach to generating the right active phase in the "Direct" synthesis of trimethoxysilanes using the CuCl-Cu2O catalyst[J]. APPLIED SURFACE SCIENCE,2021,544:8.
APA Su, Kai.,Ji, Yongjun.,Zhou, Xiwen.,Jiang, Xingyu.,Li, Huifang.,...&Su, Fabing.(2021).Approach to generating the right active phase in the "Direct" synthesis of trimethoxysilanes using the CuCl-Cu2O catalyst.APPLIED SURFACE SCIENCE,544,8.
MLA Su, Kai,et al."Approach to generating the right active phase in the "Direct" synthesis of trimethoxysilanes using the CuCl-Cu2O catalyst".APPLIED SURFACE SCIENCE 544(2021):8.
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