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Following the Thermal and Chemical Activation of Supported Au Clusters using X-ray Absorption Spectroscopy

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dc.contributor.authorShivhare, Atal
dc.contributor.authorScott, Robert WJ
dc.date.accessioned2018-11-19T21:35:47Z
dc.date.available2018-11-19T21:35:47Z
dc.date.issued2016
dc.description.abstractAl2O3-supported Au25(SC8H9)18 clusters with various Au loadings were thermally and chemically treated in order to determine the most efficient method towards the removal of thiolate stabilizers while avoiding unwanted increases in cluster size due to agglomeration and sintering. X-ray absorption spectroscopy (XAS) and transmission electron microscopy (TEM) were used to investigate samples before and after thermal and chemical treatments. Results show that while 250 °C thermal treatment leads to nearly complete removal of thiolate stabilizers, it comes with a concomitant increase in cluster size as sintering becomes problematic. In contrast, chemical reduction treatments using borohydride reducing agents does not lead to significant growth in cluster size, but only allows for partial thiolate removal. These results are important as many researchers look to determine optimal activation conditions for ultra-monodisperse Au and bimetallic clusters for use as model catalysts without destroying their original structures.en_US
dc.description.sponsorshipNSERCen_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationA. Shivhare, R. W. J. Scott, RSC Adv. , 2016, 6, 62579-62584.en_US
dc.identifier.doi10.1039/C6RA10941A
dc.identifier.urihttp://hdl.handle.net/10388/11519
dc.publisherRoyal Society of Chemistryen_US
dc.subjectClustersen_US
dc.subjectActivationen_US
dc.subjectGolden_US
dc.subjectX-ray absorption spectroscopyen_US
dc.titleFollowing the Thermal and Chemical Activation of Supported Au Clusters using X-ray Absorption Spectroscopyen_US
dc.typeArticleen_US

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