Publication: Graphene aerogel supported pt electrocatalysts for oxygen reduction reaction by supercritical deposition
dc.contributor.coauthor | Yu, Haibo | |
dc.contributor.coauthor | Aindow, Mark | |
dc.contributor.department | Department of Chemistry | |
dc.contributor.department | Department of Chemical and Biological Engineering | |
dc.contributor.department | Graduate School of Sciences and Engineering | |
dc.contributor.department | KUTEM (Koç University Tüpraş Energy Center) | |
dc.contributor.department | KUYTAM (Koç University Surface Science and Technology Center) | |
dc.contributor.kuauthor | Barım, Şansım Bengisu | |
dc.contributor.kuauthor | Bozbağ, Selmi Erim | |
dc.contributor.kuauthor | Erkey, Can | |
dc.contributor.kuauthor | Öztuna, Feriha Eylül Saraç | |
dc.contributor.kuauthor | Ünal, Uğur | |
dc.contributor.schoolcollegeinstitute | College of Engineering | |
dc.contributor.schoolcollegeinstitute | College of Sciences | |
dc.contributor.schoolcollegeinstitute | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
dc.contributor.schoolcollegeinstitute | Research Center | |
dc.date.accessioned | 2024-11-10T00:06:01Z | |
dc.date.issued | 2017 | |
dc.description.abstract | Mesoporous 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.indexedby | WOS | |
dc.description.indexedby | Scopus | |
dc.description.openaccess | NO | |
dc.description.publisherscope | International | |
dc.description.sponsoredbyTubitakEu | N/A | |
dc.description.sponsorship | Koc University Tupras Energy Center (KUTEM) | |
dc.description.sponsorship | Koc 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.volume | 250 | |
dc.identifier.doi | 10.1016/j.electacta.2017.08.067 | |
dc.identifier.eissn | 1873-3859 | |
dc.identifier.issn | 0013-4686 | |
dc.identifier.quartile | Q1 | |
dc.identifier.scopus | 2-s2.0-85027846378 | |
dc.identifier.uri | https://doi.org/10.1016/j.electacta.2017.08.067 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14288/16543 | |
dc.identifier.wos | 410679300022 | |
dc.keywords | Graphene aerogel | |
dc.keywords | Supercritical deposition | |
dc.keywords | Oxygen reduction reaction | |
dc.keywords | Proton exchange membrane fuel cell | |
dc.keywords | Platinum nanoparticles | |
dc.language.iso | eng | |
dc.publisher | Elsevier | |
dc.relation.ispartof | Electrochimica Acta | |
dc.subject | Electrochemistry | |
dc.title | Graphene aerogel supported pt electrocatalysts for oxygen reduction reaction by supercritical deposition | |
dc.type | Journal Article | |
dspace.entity.type | Publication | |
local.contributor.kuauthor | Öztuna, Feriha Eylül Saraç | |
local.contributor.kuauthor | Barım, Şansım Bengisu | |
local.contributor.kuauthor | Bozbağ, Selmi Erim | |
local.contributor.kuauthor | Ünal, Uğur | |
local.contributor.kuauthor | Erkey, Can | |
local.publication.orgunit1 | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
local.publication.orgunit1 | College of Sciences | |
local.publication.orgunit1 | College of Engineering | |
local.publication.orgunit1 | Research Center | |
local.publication.orgunit2 | Department of Chemistry | |
local.publication.orgunit2 | Department of Chemical and Biological Engineering | |
local.publication.orgunit2 | KUYTAM (Koç University Surface Science and Technology Center) | |
local.publication.orgunit2 | KUTEM (Koç University Tüpraş Energy Center) | |
local.publication.orgunit2 | Graduate School of Sciences and Engineering | |
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