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  Cu supported on thin carbon layer-coated porous SiO2 for efficient ethanol dehydrogenation

Wang, Q.-N., Shi, L., Li, W., Li, W.-C., Si, R., Schüth, F., et al. (2018). Cu supported on thin carbon layer-coated porous SiO2 for efficient ethanol dehydrogenation. Catalysis Science & Technology, 8(2), 472-479. doi:10.1039/C7CY02057K.

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 Creators:
Wang, Qing-Nan1, Author
Shi, Lei1, Author
Li , Wei2, Author
Li, Wen-Cui1, Author
Si, Rui2, Author
Schüth, Ferdi3, Author              
Lu, An-Hui1, Author
Affiliations:
1State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China , ou_persistent22              
2Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China , ou_persistent22              
3Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              

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 Abstract: We report a designed Cu/C/SiO2 composite catalyst, which shows a high acetaldehyde selectivity (up to ∼98%) and good stability for a 60 h test at 260 °C in ethanol dehydrogenation. Various characterization techniques demonstrate that the carbon covers the Si–OH groups on silica and promotes the reduction of Cu+ to Cu0. This reduces the concentration of active sites for secondary reactions of CH3CHO, which leads to a high initial selectivity (∼93%) as compared to that of Cu/SiO2 (∼76%). Moreover, the chemical interaction between Cu and SiO2 of the C/SiO2 support, verified by X-ray photoelectron spectroscopy, enhances the interaction between the metal and the support and thus contributes to prevention of the agglomeration of Cu particles, which is the reason for the good catalytic stability of Cu/C/SiO2. Thus, this study is an example of how careful design of the catalyst can strongly improve the catalytic performance.

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Language(s): eng - English
 Dates: 2017-10-092017-12-042018-01-21
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/C7CY02057K
 Degree: -

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Title: Catalysis Science & Technology
  Other : Catal. Sci. Technol.
Source Genre: Journal
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Publ. Info: Cambridge : Royal Society of Chemistry
Pages: - Volume / Issue: 8 (2) Sequence Number: - Start / End Page: 472 - 479 Identifier: ISSN: 2044-4753
CoNE: https://pure.mpg.de/cone/journals/resource/2044-4753