Repository logo
HARVEST
 

in situ X-ray Absorption Spectroscopic Analysis of Gold-Palladium Bimetallic Nanoparticle Catalysts

Simple item page
dc.contributor.authorMacLennan, Aimee
dc.contributor.authorBanerjee, Abhinandan
dc.contributor.authorHu, Yongfeng
dc.contributor.authorMiller, Jeffrey T
dc.contributor.authorScott, Robert WJ
dc.date.accessioned2018-11-26T20:51:41Z
dc.date.available2018-11-26T20:51:41Z
dc.date.issued2013
dc.description.abstractGold–palladium core–shell nanoparticles have been previously shown to be extremely effective catalysts for a number of oxidation reactions including the aerobic oxidation of alcohols. However, the novel activity and durability of such catalysts are still poorly understood, and there are several putative mechanisms by which oxidation reactions can proceed. Previously we showed that Pd(II) salts in the presence of Au nanoparticles were also effective catalysts for the room temperature oxidation of crotyl alcohol. Herein we show an in situ X-ray absorption spectroscopy (XAS) study at both the Pd–K and Pd-LIII edges of Au nanoparticle/Pd(II) salt solutions in the presence of crotyl alcohol. Liquid cells with X-ray permeable windows were used to obtain quick-scan XAS data during the oxidation of crotyl alcohol, allowing for time-resolved Pd speciation information and information about the reaction mechanism and kinetics. XAS measurements definitively show that the first step of this reaction involves Pd reduction onto the Au nanoparticles; in addition, further studies of the stability of the resulting Au–Pd core–shell nanoparticles toward oxygen gas suggests that the role of Au in such catalysts is to prevent the reoxidation of the catalytically active surface Pd atoms. Catalytic crotyl alcohol oxidation measurements were done which validated that the in situ reduction of Pd(II) in the presence of Au nanoparticles did indeed result in catalytically active AuPd bimetallic catalysts.en_US
dc.description.sponsorshipNSERCen_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationA. MacLennan, A. Banerjee, Y. Hu, J. T. Miller, R. W. J. Scott ACS Catalysis, 2013, 3, 1411–1419.en_US
dc.identifier.doi10.1021/cs400230t
dc.identifier.urihttp://hdl.handle.net/10388/11538
dc.publisherAmerican Chemical Societyen_US
dc.subjectBimetallicen_US
dc.subjectX-ray absorption spectroscopyen_US
dc.subjectIn situen_US
dc.subjectCatalysisen_US
dc.subjectOxidationen_US
dc.titlein situ X-ray Absorption Spectroscopic Analysis of Gold-Palladium Bimetallic Nanoparticle Catalystsen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
In-Situ Paper_revised2_final_nohilights.docx
Size:
2.11 MB
Format:
Microsoft Word XML
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.28 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Chemistry