Publication:
Graphene aerogel supported pt electrocatalysts for oxygen reduction reaction by supercritical deposition

dc.contributor.coauthorYu, Haibo
dc.contributor.coauthorAindow, Mark
dc.contributor.departmentDepartment of Chemistry
dc.contributor.departmentDepartment of Chemical and Biological Engineering
dc.contributor.departmentGraduate School of Sciences and Engineering
dc.contributor.departmentKUTEM (Koç University Tüpraş Energy Center)
dc.contributor.departmentKUYTAM (Koç University Surface Science and Technology Center)
dc.contributor.kuauthorBarım, Şansım Bengisu
dc.contributor.kuauthorBozbağ, Selmi Erim
dc.contributor.kuauthorErkey, Can
dc.contributor.kuauthorÖztuna, Feriha Eylül Saraç
dc.contributor.kuauthorÜnal, Uğur
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-10T00:06:01Z
dc.date.issued2017
dc.description.abstractMesoporous graphene aerogel (GA) supported Pt nanoparticles with narrow size distribution were prepared via supercritical deposition (SCD) using supercritical CO2 (scCO(2)). Pt(cod)me(2) precursor was dissolved in scCO(2) and adsorbed onto GA at 35 degrees C and 10.7 MPa. The Pt precursor was converted to its metal form under atmospheric pressure at various temperatures. The effects of precursor conversion temperature (400, 600, and 800 degrees C) on the structural properties of the composites were investigated using Raman Spectroscopy, XRD, XPS, and TEM. The average particle size increased from 1.2 to 2.9 nm when the conversion temperature was increased from 400 to 800 degrees C. The electrocatalytic activity of the samples towards the Oxygen Reduction Reaction were evaluated using cyclic voltammetry (CV) and rotating disc electrode (RDE) measurements. SCD helped to preserve the textural properties of the GA after the Pt nanoparticle deposition, and thus Pt/GA converted at 600 degrees C exhibited an enhanced mass activity of 30.6 mA mg(Pt)(-1), outperforming the mass activities reported in the literature for Pt/GA electrocatalysts prepared using conventional routes. (C) 2017 Elsevier Ltd. All rights reserved.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipKoc University Tupras Energy Center (KUTEM)
dc.description.sponsorshipKoc University Surface Science and Technology Center (KUYTAM) We are grateful to Koc University Tupras Energy Center (KUTEM) and Koc University Surface Science and Technology Center (KUYTAM) for the generous support. We would also like to thank Emel Yilgor and Prof. Dr. Iskender Yilgor of Chemistry Department, Koc University for their help and fruitful discussion during the thermogravimetric analysis of GA samples.
dc.description.volume250
dc.identifier.doi10.1016/j.electacta.2017.08.067
dc.identifier.eissn1873-3859
dc.identifier.issn0013-4686
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-85027846378
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2017.08.067
dc.identifier.urihttps://hdl.handle.net/20.500.14288/16543
dc.identifier.wos410679300022
dc.keywordsGraphene aerogel
dc.keywordsSupercritical deposition
dc.keywordsOxygen reduction reaction
dc.keywordsProton exchange membrane fuel cell
dc.keywordsPlatinum nanoparticles
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofElectrochimica Acta
dc.subjectElectrochemistry
dc.titleGraphene aerogel supported pt electrocatalysts for oxygen reduction reaction by supercritical deposition
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorÖztuna, Feriha Eylül Saraç
local.contributor.kuauthorBarım, Şansım Bengisu
local.contributor.kuauthorBozbağ, Selmi Erim
local.contributor.kuauthorÜnal, Uğur
local.contributor.kuauthorErkey, Can
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Sciences
local.publication.orgunit1College of Engineering
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2Department of Chemical and Biological Engineering
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
local.publication.orgunit2KUTEM (Koç University Tüpraş Energy Center)
local.publication.orgunit2Graduate School of Sciences and Engineering
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