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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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 Urheber:
Wang, Qing-Nan1, Autor
Shi, Lei1, Autor
Li , Wei2, Autor
Li, Wen-Cui1, Autor
Si, Rui2, Autor
Schüth, Ferdi3, Autor           
Lu, An-Hui1, Autor
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2017-10-092017-12-042018-01-21
 Publikationsstatus: Erschienen
 Seiten: 8
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1039/C7CY02057K
 Art des Abschluß: -

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Titel: Catalysis Science & Technology
  Andere : Catal. Sci. Technol.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Cambridge : Royal Society of Chemistry
Seiten: - Band / Heft: 8 (2) Artikelnummer: - Start- / Endseite: 472 - 479 Identifikator: ISSN: 2044-4753
CoNE: https://pure.mpg.de/cone/journals/resource/2044-4753