Publication:
PtPd/BP2000 electrocatalysts prepared by sequential supercritical carbon dioxide deposition

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Bayrakçeken, Ayşe
Zhang, L. C.
Aindow, Mark

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Publication Date

2010

Language

English

Type

Journal Article

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Abstract

Sequential supercriticalcarbondioxide(scCO2)depositionwasusedtodepositPdnanoparticlesonPt/BP2000resultinginPdPt/BP2000withPt:Pdatomicratiosvaryingbetween 2:1and1:4.Theaverageparticlesizedecreasedandtheparticlesizedistributionbecame narrowerwithincreasingPtcontent.Thesmallparticleswithsizesbetween1and4nm werefoundtoberichinPtandparticleslargerthan5nmwerefoundtoberichinPd.The cyclicvoltammetryforhydrogenoxidationreactionindicatedthat thePtPd/BP2000 (2:1) catalysthadthehighest ESA. Theshapesof thevoltammograms forall Pdcontaining catalystsresembledtheshapeof thevoltammogramsof thePt/BP2000catalystafter300 cyclesduetothedissolutioningof thePdfromthecatalystsurface.Thestabilityof the prepared catalystswas further evaluated by accelerated degradation tests including potentialcycling(0.6e1.2V)andpotentialholdingtests.TheORRactivitydecreasedafter potentialcyclingforallthecatalysts.

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International Journal of Hydrogen Energy

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Subject

Chemistry, Physical, Electrochemistry, Energy, Fuels

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