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Theoretical Investigation of the Reaction Mechanism of the Guaiacol Hydrogenation over a Pt(111) Catalyst

Journal Article · · ACS Catalysis
DOI:https://doi.org/10.1021/cs5016244· OSTI ID:1656912
 [1];  [1];  [1];  [1]
  1. University of South Carolina, Columbia, SC (United States)
The reaction mechanism of the mild hydrogenation of guaiacol over Pt(111) has been investigated by density functional theory calculations and microkinetic modeling. Our model suggests that at 573 K, catechol is the preferred reaction product and that any deoxygenation to, for example, phenol or benzene is at least 4 orders of magnitude slower than the production of catechol. Slow deoxygenation of guaiacol can occur by decarbonylation and possibly by hydrogenation of the phenyl ring followed by C–OH bond cleavage. Direct –OH removal without activation of the phenyl ring is found to be at least 5 orders of magnitude slower. Altogether, this study suggests that Pt(111) sites are not active deoxygenation sites and that the experimentally observed deoxygenation activity of Pt catalysts originates likely from the involvement of the catalyst support or Pt step and corner sites.
Research Organization:
University of South Carolina, Columbia, SC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
SC0007167
OSTI ID:
1656912
Alternate ID(s):
OSTI ID: 3001217
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 4 Vol. 5; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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