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Article

Plasmonic Au–Pd Bimetallic Nanocatalysts for Hot-Carrier-Enhanced Photocatalytic and Electrochemical Ethanol Oxidation

1
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD 20783, USA
2
General Technical Services, Wall, NJ 07727, USA
3
Electro-Optic Technology Division, Naval Surface Warfare Center, Crane, IN 47522, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Duncan Gregory
Crystals 2021, 11(3), 226; https://doi.org/10.3390/cryst11030226
Received: 22 January 2021 / Revised: 18 February 2021 / Accepted: 20 February 2021 / Published: 25 February 2021
(This article belongs to the Special Issue Directed Surface Plasmon Resonance for Hot-Carrier Applications)
Gold–palladium (Au–Pd) bimetallic nanostructures with engineered plasmon-enhanced activity sustainably drive energy-intensive chemical reactions at low temperatures with solar simulated light. A series of alloy and core–shell Au–Pd nanoparticles (NPs) were prepared to synergistically couple plasmonic (Au) and catalytic (Pd) metals to tailor their optical and catalytic properties. Metal-based catalysts supporting a localized surface plasmon resonance (SPR) can enhance energy-intensive chemical reactions via augmented carrier generation/separation and photothermal conversion. Titania-supported Au–Pd bimetallic (i) alloys and (ii) core–shell NPs initiated the ethanol (EtOH) oxidation reaction under solar-simulated irradiation, with emphasis toward driving carbon–carbon (C–C) bond cleavage at low temperatures. Plasmon-assisted complete oxidation of EtOH to CO2, as well as intermediary acetaldehyde, was examined by monitoring the yield of gaseous products from suspended particle photocatalysis. Photocatalytic, electrochemical, and photoelectrochemical (PEC) results are correlated with Au–Pd composition and homogeneity to maintain SPR-induced charge separation and mitigate the carbon monoxide poisoning effects on Pd. Photogenerated holes drive the photo-oxidation of EtOH primarily on the Au-Pd bimetallic nanocatalysts and photothermal effects improve intermediate desorption from the catalyst surface, providing a method to selectively cleave C–C bonds. View Full-Text
Keywords: plasmonic resonance; catalytic energy conversion; nanomaterials plasmonic resonance; catalytic energy conversion; nanomaterials
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MDPI and ACS Style

Boltersdorf, J.; Leff, A.C.; Forcherio, G.T.; Baker, D.R. Plasmonic Au–Pd Bimetallic Nanocatalysts for Hot-Carrier-Enhanced Photocatalytic and Electrochemical Ethanol Oxidation. Crystals 2021, 11, 226. https://doi.org/10.3390/cryst11030226

AMA Style

Boltersdorf J, Leff AC, Forcherio GT, Baker DR. Plasmonic Au–Pd Bimetallic Nanocatalysts for Hot-Carrier-Enhanced Photocatalytic and Electrochemical Ethanol Oxidation. Crystals. 2021; 11(3):226. https://doi.org/10.3390/cryst11030226

Chicago/Turabian Style

Boltersdorf, Jonathan; Leff, Asher C.; Forcherio, Gregory T.; Baker, David R. 2021. "Plasmonic Au–Pd Bimetallic Nanocatalysts for Hot-Carrier-Enhanced Photocatalytic and Electrochemical Ethanol Oxidation" Crystals 11, no. 3: 226. https://doi.org/10.3390/cryst11030226

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