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In situ X-ray Absorption Spectroscopic Study of Fe@FexOy/Pd and Fe@FexOy/Cu Nanoparticle Catalysts Prepared by Galvanic Exchange Reactions

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dc.contributor.authorYao, Yali
dc.contributor.authorPatzig, Christian
dc.contributor.authorHu, Yongfeng
dc.contributor.authorScott, Robert WJ
dc.date.accessioned2018-11-20T19:24:29Z
dc.date.available2018-11-20T19:24:29Z
dc.date.issued2015
dc.description.abstractFe@FexOy core–shell nanoparticles have been previously shown to be a versatile support for catalytic metals such as Pd and Cu. However, the resulting structure, metal speciation, and performance of such catalysts in catalytic reactions are still poorly understood. Herein, we synthesize Fe@FexOy-supported Pd and Cu nanoparticles by controlling the molar ratios of Fe@FexOy nanoparticles to Pd2+ or Cu2+ species. Scanning transmission electron microscopy analyses show that Pd or Cu NPs are deposited on the exterior shell of the Fe@FexOy nanoparticles. In situ X-ray absorption near-edge structure (XANES) spectra were used to follow the formation processes of Fe@FexOy/Pd and Fe@FexOy/Cu nanoparticles and the performance of Fe@FexOy/Pd nanoparticles for Suzuki–Miyaura cross-coupling reactions. The results show that different molar ratios of Fe@FexOy nanoparticles to Pd2+ or Cu2+ lead to different morphologies of the resulting supported-NP structures. In situ XANES results show that Fe@FexOy nanoparticles can effectively fully reduce Pd or Cu salts over the course of ∼20 min to give small Pd or larger Cu nanoparticles on the surface and can also rereduce oxidized Pd in Suzuki–Miyaura cross-coupling reactions.en_US
dc.description.sponsorshipNSERCen_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationY. Yao, C. Patzig, Y. Hu, R. W. J. Scott, J. Phys. Chem. C , 2015, 119, 21209–21218.en_US
dc.identifier.doi10.1021/acs.jpcc.5b06155
dc.identifier.urihttp://hdl.handle.net/10388/11525
dc.publisherAmerican Chemical Societyen_US
dc.subjectIn situen_US
dc.subjectX-ray absorption spectroscopyen_US
dc.subjectGalvanic Reactionen_US
dc.subjectIronen_US
dc.subjectNanoparticlesen_US
dc.titleIn situ X-ray Absorption Spectroscopic Study of Fe@FexOy/Pd and Fe@FexOy/Cu Nanoparticle Catalysts Prepared by Galvanic Exchange Reactionsen_US
dc.typeArticleen_US

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