Journal
JOURNAL OF CATALYSIS
Volume 400, Issue -, Pages 294-300Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2021.06.015
Keywords
Lignin; Hydrodeoxygenation (HDO); Nickel; Bifunctional catalyst
Categories
Funding
- U.S. National Science Foundation [CBET-1508048]
- NSF National Nanotechnology Coordinated Infrastructure Program [NNCI-2025608]
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Decorating the surface of a Ni catalyst with WOx enhances the HDO selectivity of m-cresol, indicating the reaction proceeds via a direct HDO pathway. XPS analysis shows synergistic interactions between WOx and Ni help maintain a high concentration of oxygen vacancies in monolayer WOx.
The effect of decorating the surface of a Ni catalyst with WOx on its activity and selectivity for the hydrodeoxygenation (HDO) of m-cresol was investigated. The reaction of m-cresol in the presence of H-2 over an unmodified Ni/C catalyst produced both toluene and methylcyclohexane as well as a range of non-HDO products in which the ring had been hydrogenated. This catalyst was also active for C-C bond hydrogenolysis at temperatures above 600 K. In contrast, modifying the Ni with a sub-monolayer amount of WOx deposited via atomic layer deposition (ALD) enhanced the m-cresol HDO selectivity with toluene and methylcyclohexane being the only products produced indicating that the reaction proceeds via direct HDO pathway on this catalyst. XPS in this and previous studies indicate that synergistic interactions between the WOx and the Ni help maintain a high concentration of oxygen vacancies in the monolayer WOx species which are the active sites for the HDO reaction. (C) 2021 Elsevier Inc. All rights reserved.
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