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Surface Plasmon Resonant Gold-Palladium Bimetallic Nanoparticles for Promoting Catalytic Oxidation

Published online by Cambridge University Press:  30 April 2019

Jonathan Boltersdorf Open the ORCID record for Jonathan Boltersdorf [Opens in a new window] ,
Asher C. Leff ,
Gregory T. Forcherio ,
Joshua P. McClure  and
Cynthia A. Lundgren
Jonathan Boltersdorf*
Affiliation:
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD20783-1138, USA
Asher C. Leff
Affiliation:
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD20783-1138, USA General Technical Services, Adelphi, MD20783-1138, USA
Gregory T. Forcherio
Affiliation:
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD20783-1138, USA
Joshua P. McClure
Affiliation:
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD20783-1138, USA
Cynthia A. Lundgren
Affiliation:
United States Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, MD20783-1138, USA
*
*(Email: jonathan.a.boltersdorf.civ@mail.mil)
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Abstract

Colloidal gold-palladium (Au-Pd) bimetallic nanoparticles were used as catalysts to study the ethanol (EtOH) photo-oxidation cycle, with an emphasis towards driving carbon-carbon (C-C) bond cleavage at low temperatures. Au-Pd bimetallic alloy and core-shell nanoparticles were prepared to synergistically couple a plasmonic absorber (Au) with a catalytic metal (Pd) with composite optical and catalytic properties tailored towards promoting photocatalytic oxidation. Catalysts utilizing metals that exhibit localized surface plasmon resonance (SPR) can be harnessed for light-driven enhancement for small molecule oxidation via augmented photocarrier generation/separation and photothermal conversion. The coupling of Au to Pd in an alloy or core-shell nanostructure maintains SPR-induced charge separation, mitigates the poisoning effects on Pd, and allows for improved EtOH oxidation. The Au-Pd nanoparticles were coupled to semiconducting titanium dioxide photocatalysts to probe their effects on plasmonically-assisted photocatalytic oxidation of EtOH. Complete oxidation of EtOH to CO2 under solar simulated-light irradiation was confirmed by monitoring the yield of gaseous products. Bimetallics provide a pathway for driving desired photocatalytic and photoelectrochemical reactions with superior catalytic activity and selectivity.

Keywords

nanostructureplasmoniccatalyticethanol
Type
Articles
Information
MRS Advances , Volume 4 , Issue 33-34: Energy and Sustainability , 2019 , pp. 1877 - 1886
Copyright
Copyright © Materials Research Society 2019 

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References

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