Publication:
Pt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique

dc.contributor.coauthorBayrakceken, Ayse
dc.contributor.coauthorSmirnova, Alevtina
dc.contributor.coauthorKitkamthorn, Usanee
dc.contributor.coauthorAindow, Mark
dc.contributor.coauthorTurker, Lemi
dc.contributor.coauthorEroglu, Inci
dc.contributor.departmentDepartment of Chemical and Biological Engineering
dc.contributor.kuauthorErkey, Can
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.date.accessioned2024-11-10T00:02:46Z
dc.date.issued2008
dc.description.abstractPt-based electrocatalysts were prepared on different carbon supports which are multiwall carbon nanotubes (MWCNTs), Vulcan XC 72R (VXR) and black pearl 2000 (BP2000) using a supercritical carbon dioxide (ScCO2) deposition technique. These catalysts were characterized by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and cyclic voltammetry (CV). XRD and HRTEM results demonstrated that the ScCO2 deposition technique enables a high surface area metal phase to be deposited, with the size of the Pt particles ranging from 1 to 2 nm. The electrochemical surface areas (ESAs) of the prepared electrocatalysts were compared to the surface areas of commercial ETEK Pt/C (10 wt% Pt) and Tanaka Pt/C (46.5 wt% Pt) catalysts. The CV data indicate that the ESAs of the prepared Pt/VXR and Pt/MWCNT catalysts are about three times larger than that of the commercial ETEK catalyst for similar (10 wt% Pt) loadings. Oxygen reduction activity was investigated by hydrodynamic voltammetry. From the slope of Koutecky-Levich plots, the average number of electrons transferred in the oxygen reduction reaction (ORR) was 3.5, 3.6 and 3.7 for Pt/BP2000, Pt/VXR and Pt/MWCNT, correspondingly, which indicated almost complete reduction of oxygen to water. (C) 2008 Published by Elsevier B.V.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue2
dc.description.openaccessNO
dc.description.sponsoredbyTubitakEuN/A
dc.description.volume179
dc.identifier.doi10.1016/j.jpowsour.2007.12.086
dc.identifier.eissn1873-2755
dc.identifier.issn0378-7753
dc.identifier.scopus2-s2.0-40749115589
dc.identifier.urihttps://doi.org/10.1016/j.jpowsour.2007.12.086
dc.identifier.urihttps://hdl.handle.net/20.500.14288/16195
dc.identifier.wos255299900012
dc.keywordssupercritical carbon dioxide deposition
dc.keywordselectrocatalyst
dc.keywordscarbon
dc.keywordspolymer electrolyte membrane fuel cell
dc.keywordsplatinum
dc.keywordsPlatinum-based electrocatalysts
dc.keywordsOxygen reduction reaction
dc.keywordsSupported catalysts
dc.keywordsCarbon nanotubes
dc.keywordsElectrochemical reduction
dc.keywordsAerogel nanocomposites
dc.keywordsNanoparticles
dc.keywordsPerformance
dc.keywordsMethanol
dc.keywordsCathode
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofJournal of Power Sources
dc.subjectChemistry
dc.subjectPhysical
dc.subjectElectrochemistry
dc.subjectEnergy
dc.subjectFuels
dc.subjectMaterials science
dc.titlePt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorErkey, Can
local.publication.orgunit1College of Engineering
local.publication.orgunit2Department of Chemical and Biological Engineering
relation.isOrgUnitOfPublicationc747a256-6e0c-4969-b1bf-3b9f2f674289
relation.isOrgUnitOfPublication.latestForDiscoveryc747a256-6e0c-4969-b1bf-3b9f2f674289
relation.isParentOrgUnitOfPublication8e756b23-2d4a-4ce8-b1b3-62c794a8c164
relation.isParentOrgUnitOfPublication.latestForDiscovery8e756b23-2d4a-4ce8-b1b3-62c794a8c164

Files