| Publication Type |
Journal Article |
| Title |
Looking inside the pores of a MCM-41 based Mo heterogeneous styrene oxidation catalyst: an inelastic neutron scattering study |
| Authors |
Cristina I. Fernandes Svemir Rudic P. D. Vaz C. D. Nunes |
| Groups |
|
| Journal |
PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
| Year |
2016 |
| Month |
July |
| Volume |
18 |
| Number |
26 |
| Pages |
17272-17280 |
| Abstract |
Styrene oxidation mediated by a Mo-based mesoporous catalyst can yield selectively styrene oxide or benzaldehyde. Kinetic data evidenced that styrene oxide is the initial single-product formed by the catalytic Mo-mediated process. However, after some hours of reaction benzaldehyde yield rises while that of the epoxide decreases concomitantly. The mechanistic proposal pointed to a surface assisted acid-base mechanism by which styrene oxide is interconverted into benzaldehyde through over-oxidation and cleavage of the C-C bond and releases formaldehyde as well. In an attempt to gain some insight into whether this mechanistic proposal is realistic we have conducted a combined DRIFT and inelastic neutron scattering (INS) study to assess the adsorbed species at the catalyst s surface and confirm the mechanistic proposal. INS and DRIFT provided complementary insight into surface-adsorbed species by probing donor (INS) and acceptor (DRIFT) species. INS also allowed for an estimation of product selectivity by means of a Job method stressing the power of the technique. |
| DOI |
http://dx.doi.org/10.1039/c6cp01243d |
| ISBN |
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| Publisher |
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| Book Title |
|
| ISSN |
1463-9076 |
| EISSN |
1463-9084 |
| Conference Name |
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| Bibtex ID |
ISI:000379482100017 |
| Observations |
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