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Título

A polyoxometalate-assisted approach for synthesis of Pd nanoparticles on graphene nanosheets: synergistic behaviour for enhanced electrocatalytic activity

AutorAhmadpour, Ali; Mitchell, Scott G.; Fuente, Jesús M. de la
Fecha de publicaciónfeb-2015
EditorRoyal Society of Chemistry (Great Britain)
CitaciónRSC Advances 5(31): 24319-24326 (2015)
ResumenA polyoxometalate (POM) assisted approach has been employed to prepare a nanohybrid of Pd nanoparticles (PdNPs) and graphene nanosheets (GNSs). The Keggin-type POM, phosphomolybdic acid (PMo12), was applied to serve as both reducing and stabilising agent. The as-prepared nanohybrid (Pd/PMo12/GNSs) was comprehensively characterised using transmission electron microscopy and X-ray diffraction analysis. The synergistic behaviour of PdNPs, PMo12 and GNSs in the nanohybrid leads to elevated electrocatalytic property for ethanol oxidation. Moreover, the Pd/PMo12/GNSs nanohybrid was activated by applying a sufficiently negative potential which plays a key role in promoting the electrocatalytic activity. The activated catalyst presents a superior performance towards ethanol electrooxidation reaction and shows better tolerance to poisoning species compared to Pd and Pt nanoparticles. The outstanding electrocatalytic activity of the tri-component (Pd/PMo12/GNSs) nanohybrid is discussed with relevance to its application in direct alcohol fuel cells (DAFCs).
Descripciónet al.
Versión del editorhttp://dx.doi.org/10.1039/C5RA01084E
URIhttp://hdl.handle.net/10261/121356
DOI10.1039/C5RA01084E
E-ISSN2046-2069
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