Confinement Effects on Furfuryl Alcohol Reactions over Porous Bilayer Silica-Modified Pd(111)

In recent years, hexagonally ordered silica bilayer films have been successfully grown and characterized on metal substrates. To investigate how confinement effects from the silica films can influence catalytic reactions, we studied the reaction of furfuryl alcohol on a Pd(111) surface modified with...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physical chemistry. C 2020-11, Vol.124 (46), p.25437-25446
Main Authors: Mark, Lesli O, Chen, Wei, Eads, Calley N, Lu, Deyu, Boscoboinik, J. Anibal, Stacchiola, Dario, Medlin, J. Will, Tenney, Samuel A
Format: Article
Language:English
Subjects:
Adsorption
Alcohols
C: Surfaces, Interfaces, Porous Materials, and Catalysis
Desorption
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Silica
Vesicles
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In recent years, hexagonally ordered silica bilayer films have been successfully grown and characterized on metal substrates. To investigate how confinement effects from the silica films can influence catalytic reactions, we studied the reaction of furfuryl alcohol on a Pd(111) surface modified with a ∼4 Å thick silica bilayer film [BL-silica/Pd(111)] containing micro- and mesopores. Temperature-programmed desorption (TPD) experiments showed that BL-silica/Pd(111) catalyzed similar reactions to those catalyzed by bare Pd(111); however, the products desorbed at higher temperatures in the presence of the film. In addition, hydrogenation of trapped C3H X fragments at high temperature was detected on BL-silica/Pd(111), which resulted in propane production. Density functional theory calculations indicated that the BL-silica film weakened adsorption of reaction intermediates, including atomic hydrogen, on the Pd surface. The overall effect of the film opens the possibility of selectively hydrogenating multifunctional molecules, with significantly higher selectivity than on the bare Pd(111) surface.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.0c09095