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Mechanistic Study of the Direct Hydrodeoxygenation of m-Cresol over WOx-Decorated Pt/C Catalysts

Journal Article · · ACS Catalysis
 [1];  [2];  [3];  [3];  [3];  [3];  [2];  [4];  [3]
  1. University of Pennsylvania, Philadelphia, PA (United States); University of Delaware, Newark, DE (United States); DOE/OSTI
  2. University of Delaware, Newark, DE (United States)
  3. University of Pennsylvania, Philadelphia, PA (United States)
  4. University of Pennsylvania, Philadelphia, PA (United States); University of Delaware, Newark, DE (United States)
In this report hydrodeoxygenation (HDO) of m-cresol to produce toluene over carbon-supported Pt and Pt-WOx catalysts was studied. In stark contrast to Pt/C that exhibits only modest selectivity and low stability for this reaction, Pt-WOx/C was found to be unusually active and selective to toluene with greater than 94% selectivity to this product while exhibiting little to no deactivation under a wide range of reaction conditions. Reactivity studies in combination with density functional theory (DFT) calculations for the adsorption and reaction of m-cresol on structurally optimized WOx-decorated Pt(111) structures indicate that the HDO reaction on Pt-WOx/C proceeds via a direct hydrogenolysis of the C–O bond in m-cresol adsorbed on oxygen vacancy (or redox) sites on WOx species. The DFT results also indicate that Pt helps stabilize the WOx film while facilitating oxygen vacancy formation.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States); University of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0001004
OSTI ID:
1539510
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 9 Vol. 8; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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