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Highly branched Pt Cu nanodandelion with high activity for oxygen reduction reaction

2018-11Journal article Restricted access
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dc.contributor.authorYang, Tao
dc.contributor.authorPukazhselvan, D.
dc.contributor.authorda Silva, E.L.
dc.contributor.authorSantos, Mario C.
dc.contributor.authorMeng, Lijian
dc.contributor.authorRamasamy, Devaraj
dc.contributor.authorJothi, Sathiskumar
dc.contributor.authorGraça, Vanessa
dc.contributor.authorShi, Shikao
dc.date.accessioned2018-12-03T14:30:24Z
dc.date.embargo2119
dc.date.issued2018-11
dc.description.abstractA facile hydrothermal route has been developed to synthesize the highly branched Pt58Cu42 nanoparticles via mixing the H2PtCl6 and CuCl2 with octadecylamine. The Pt58Cu42 after post treatment forms a dandelion flower 3-D structure. A combination of both the branched shape and PtCu composition effects in the Pt58Cu42-nanoparticles shows superior electrocatalytic activity and durability to commercial Pt black for oxygen reduction reaction. The mechanism for the de-alloying and reconstructing of the Pt58Cu42-nanoparticles in electrochemical activity and durability tests has been proposed. It is found that after the durability process, the Pt58Cu42 precursor alloy changes into a substantially Pt enriched PtCu alloy (Pt79Cu21) with a Pt skin. The Pt skin effectively prevents the further dissolution of the Cu below the near-surface to enhance its durability. What's more, the Pt skin exposed to (111) planes which have the lowest surface energy among the low-index planes further promotes the improvement of durability of the PtCu catalyst.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.ijhydene.2018.11.044pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.22/12347
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0360319918336206?via%3Dihubpt_PT
dc.subjectPt-Cupt_PT
dc.subjectAlloypt_PT
dc.subjectORRpt_PT
dc.subjectDandelion nanostructurept_PT
dc.subjectPEMFCpt_PT
dc.titleHighly branched Pt Cu nanodandelion with high activity for oxygen reduction reactionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleInternational Journal of Hydrogen Energypt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT

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