inelastic neutron scattering spectroscopy
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Author(s):  
Andrea Zachariou ◽  
Alexander P. Hawkins ◽  
Russell F. Howe ◽  
Nathan Barrow ◽  
Jonathan Bradley ◽  
...  

AbstractThe adsorption of methanol in HZSM-5 at low temperatures has long been regarded as an associative process involving hydrogen bonding to the acidic zeolite hydroxyl groups. Recent studies employing inelastic neutron scattering spectroscopy (INS) have reported that complete dissociation to methoxylate the zeolite occurs at 298 K, and infrared evidence for a partial dissociation at 298 K has also been described. Here we investigate the apparent contradictions between different techniques, using a combination of INS, infrared spectroscopy and solid-state NMR spectroscopy, including isotopic substitution experiments. Different possible explanations are proposed and considered; we conclude that at room temperature methanol is very largely associatively adsorbed, although the presence of some small extent (>1%) of methoxylation cannot be ruled out.


ACS Omega ◽  
2020 ◽  
Vol 5 (14) ◽  
pp. 7762-7770 ◽  
Author(s):  
Alexander P. Hawkins ◽  
Andrea Zachariou ◽  
Stewart F. Parker ◽  
Paul Collier ◽  
Ian P. Silverwood ◽  
...  

RSC Advances ◽  
2019 ◽  
Vol 9 (33) ◽  
pp. 18785-18790 ◽  
Author(s):  
Alexander P. Hawkins ◽  
Andrea Zachariou ◽  
Paul Collier ◽  
Russell A. Ewings ◽  
Russell F. Howe ◽  
...  

The interaction between ZSM-5 and propene over the temperature range 140–373 K is investigated by application of inelastic neutron scattering spectroscopy.


2019 ◽  
Vol 21 (45) ◽  
pp. 24950-24955 ◽  
Author(s):  
Stewart F. Parker ◽  
Upali A. Jayasooriya

Inelastic neutron scattering spectroscopy allows all the modes below 800 cm−1 of Cr(CO)6, Mo(CO)6 and W(CO)6 (including the IR and Raman inactive ones) to be observed for the first time.


2018 ◽  
Vol 19 (4) ◽  
pp. 1305-1313 ◽  
Author(s):  
C. Araujo ◽  
C. S. R. Freire ◽  
M. M. Nolasco ◽  
P. J. A. Ribeiro-Claro ◽  
S. Rudić ◽  
...  

RSC Advances ◽  
2018 ◽  
Vol 8 (42) ◽  
pp. 23875-23880 ◽  
Author(s):  
Stewart F. Parker

Inelastic neutron scattering spectroscopy has detected all of the internal modes of borazine, including the infrared and Raman forbidden modes.


2016 ◽  
Vol 18 (26) ◽  
pp. 17253-17258 ◽  
Author(s):  
Timur Kandemir ◽  
Matthias Friedrich ◽  
Stewart F. Parker ◽  
Felix Studt ◽  
David Lennon ◽  
...  

Inelastic neutron scattering of Cu-based methanol synthesis catalysts revealed that the surface coverage after reaction depends on the support oxide.


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