Dynamics of Pd Subsurface Hydride Formation and Their Impact on the Selectivity Control for Selective Butadiene Hydrogenation Reaction

Structure-sensitive catalyzed reactions can be influenced by a number of parameters. So far, it has been established that the formation of Pd-C species is responsible for the behavior of Pd nanoparticles employed as catalysts in a butadiene partial hydrogenation reaction. In this study, we introduce...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2023-03, Vol.13 (6), p.1099
Main Authors: Asedegbega-Nieto, Esther, Iglesias-Juez, Ana, Di Michiel, Marco, Fernandez-Garcia, Marcos, Rodriguez-Ramos, Inmaculada, Guerrero-Ruiz, Antonio
Format: Article
Language:English
Subjects:
Animal behavior
Butadiene
Catalysts
Chemical reactions
Decomposition reactions
Graphene
Graphite
HEXRD
Hydrides
Hydrogen
Hydrogenation
Nanoparticles
Palladium
Palladium catalysts
Parameter sensitivity
partial hydrogenation
Particle size
Reaction mechanisms
Scientific imaging
Selectivity
subsurface hydride
X-ray diffraction
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Summary:Structure-sensitive catalyzed reactions can be influenced by a number of parameters. So far, it has been established that the formation of Pd-C species is responsible for the behavior of Pd nanoparticles employed as catalysts in a butadiene partial hydrogenation reaction. In this study, we introduce some experimental evidence indicating that subsurface Pd hydride species are governing the reactivity of this reaction. In particular, we detect that the extent of formation/decomposition of PdHx species is very sensitive to the Pd nanoparticle aggregate dimensions, and this finally controls the selectivity in this process. The main and direct methodology applied to determine this reaction mechanism step is time-resolved high-energy X-ray diffraction (HEXRD).
ISSN:2079-4991
2079-4991
DOI:10.3390/nano13061099