Publication: PtPd/BP2000 electrocatalysts prepared by sequential supercritical carbon dioxide deposition
Program
KU-Authors
KU Authors
Co-Authors
Bayrakçeken, Ayşe
Zhang, L. C.
Aindow, Mark
Advisor
Publication Date
Language
English
Type
Journal Title
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Volume Title
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.
Source:
International Journal of Hydrogen Energy
Publisher:
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Subject
Chemistry, Physical, Electrochemistry, Energy, Fuels