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Converting Light Energy to Chemical Energy: A New Catalytic Approach for Sustainable Environmental Remediation
journal contribution
posted on 2016-07-31, 00:00 authored by Michelle
A. Nguyen, Elsayed M. Zahran, Azaan S. Wilbon, Alexander V. Besmer, Vincent J. Cendan, William A. Ranson, Randy L. Lawrence, Joshua L. Cohn, Leonidas G. Bachas, Marc R. KnechtWe report a synthetic
approach to form cubic Cu2O/Pd
composite structures and demonstrate their use as photocatalytic materials
for tandem catalysis. Pd nanoparticles were deposited onto Cu2O cubes, and their tandem catalytic reactivity was studied
via the reductive dehalogenation of polychlorinated biphenyls. The
Pd content of the materials was gradually increased to examine its
influence on particle morphology and catalytic performance. Materials
were prepared at different Pd amounts and demonstrated a range of
tandem catalytic reactivity. H2 was generated via photocatalytic
proton reduction initiated by Cu2O, followed by Pd-catalyzed
dehalogenation using in situ generated H2. The results indicate that material morphology and composition and
substrate steric effects play important roles in controlling the overall
reaction rate. Additionally, analysis of the postreacted materials
revealed that a small number of the cubes had become hollow during
the photodechlorination reaction. Such findings offer important insights
regarding photocatalytic active sites and mechanisms, providing a
pathway toward converting light-based energy to chemical energy for
sustainable catalytic reactions not typically driven via light.
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Keywords
particle morphologytandem catalysisCu 2 O cubeschemical energyphotodechlorination reactionSuch findings offerphotocatalytic proton reductionPd contentpostreacted materialsH 2reductive dehalogenationPd nanoparticlesPd amountsmaterial morphologyChemical EnergyNew Catalytic ApproachSustainable Environmental Remediationreaction rateh 2photocatalytic materialsCu 2 OreactivityConverting Light Energysubstrate steric effectspolychlorinated biphenyls
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