Methanol Desorption From Cu-ZSM-5 Studied by In Situ Infrared Spectroscopy and First-Principles Calculations
Artikel i vetenskaplig tidskrift, 2017
The dynamic interaction of methanol and its derivatives with Cu-exchanged ZSM- 5 during methanol temperature programmed desorption from 30 to 450 ◦C has been investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy and first-principles calculations. The results emphasize that defects in the framework structure of the zeolite and Brønsted acid sites constitute ion-exchange sites for Cu ions. The Cu sites introduced in ZSM-5 actively interact with methanol adsorbed at moderate temperature, i.e. below 250◦C, and take roles in further oxidation of the adsorbed species to formate and CO. Moreover, spectra recorded at higher temperatures, i.e. above 300◦C, after adsorption of methanol show strong interaction between methoxy groups and the zeolite framework, suggesting that under mild conditions proton extraction for methanol production during direct partial oxidation of methane to methanol over Cu-ZSM-5 is necessary.
Författare
Xueting Wang
Chalmers, Kemi och kemiteknik
Kompetenscentrum katalys
Adam Arvidsson
Chalmers, Fysik, Kemisk fysik
Kompetenscentrum katalys
Magdalena O. Cichocka
Stockholms universitet
Xiaodong Zou
Stockholms universitet
Natalia Mihaela Martin
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Johan Nilsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Stefan Carlson
Max IV-laboratoriet
Johan Gustafson
Lunds universitet
Magnus Skoglundh
Kompetenscentrum katalys
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Anders Hellman
Kompetenscentrum katalys
Chalmers, Fysik, Kemisk fysik
Per-Anders Carlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Kompetenscentrum katalys
Journal of Physical Chemistry C
1932-7447 (ISSN) 1932-7455 (eISSN)
Vol. 121 49 27389-27398Tidsupplösta in situ metoder för design av katalytiska säten för hållbar kemi
Vetenskapsrådet (VR) (2013-567), 2013-01-01 -- 2016-12-31.
Drivkrafter
Hållbar utveckling
Styrkeområden
Nanovetenskap och nanoteknik
Transport
Energi
Materialvetenskap
Ämneskategorier (SSIF 2011)
Kemiska processer
Materialkemi
Annan fysik
DOI
10.1021/acs.jpcc.7b07067