Publication: Supercritical deposition coupled with ammonia treatment: a new route to co-promoted n-doped carbon aerogels with high oxygen reduction reaction activity
dc.contributor.coauthor | Deljoo, Bahareh | |
dc.contributor.coauthor | Aindow, Mark | |
dc.contributor.department | Department of Chemical and Biological Engineering | |
dc.contributor.department | Graduate School of Sciences and Engineering | |
dc.contributor.department | KUYTAM (Koç University Surface Science and Technology Center) | |
dc.contributor.department | KUTEM (Koç University Tüpraş Energy Center) | |
dc.contributor.kuauthor | Bozbağ, Selmi Erim | |
dc.contributor.kuauthor | Erkey, Can | |
dc.contributor.kuauthor | Ünsal, Seçil | |
dc.contributor.kuauthor | Yağcı, Mustafa Barış | |
dc.contributor.schoolcollegeinstitute | Research Center | |
dc.contributor.schoolcollegeinstitute | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
dc.contributor.schoolcollegeinstitute | College of Engineering | |
dc.date.accessioned | 2024-11-09T23:06:48Z | |
dc.date.issued | 2019 | |
dc.description.abstract | A new highly active family of Co-promoted N-doped carbon aerogel catalysts is prepared by a supercritical CO2-assisted technique combined with NH3 treatment. The active sites are created during the complex transformation of an organic aerogel to a carbon aerogel in the presence of cobalt by NH3 as the source of nitrogen and pyrolysis medium. The mass activity for oxygen reduction reaction (ORR) is highest for the catalyst pyrolyzed at 800 degrees C. The catalyst displays similar activity for ORR as a commercial Pt/C catalyst. Moreover, the catalyst exhibits nearly double the mass activity of N-doped carbon aerogel pyrolyzed at the same temperature. The nature of the active sites for ORR is also investigated by selectively adding or removing various species (i.e., Co-N-x and Co-O) via post acid-base treatments. After removing the Co species from the catalyst, the same activity as the parent catalyst is achieved suggesting that the Co species in the catalyst are spectators in ORR catalysis and they serve only to promote the formation of catalytically active graphitic N sites during pyrolysis in NH3. A strong correlation is found between the relative distribution of graphitic N species and the mass activity. | |
dc.description.indexedby | WOS | |
dc.description.indexedby | Scopus | |
dc.description.issue | 11 | |
dc.description.openaccess | NO | |
dc.description.publisherscope | International | |
dc.description.sponsoredbyTubitakEu | N/A | |
dc.description.sponsorship | Koc University Surface Science and Technologies Center (KUYTAM) | |
dc.description.sponsorship | Koc University TuPRAS Energy Center (KUTEM) The authors acknowledge the support of Koc University Surface Science and Technologies Center (KUYTAM) and Koc University TuPRAS Energy Center (KUTEM). The microscopy studies described in this paper were performed using the facilities in the UConn/Thermo Fisher Scientific Center for Advanced Microscopy and Materials Analysis (CAMMA). | |
dc.description.volume | 7 | |
dc.identifier.doi | 10.1002/ente.201900450 | |
dc.identifier.eissn | 2194-4296 | |
dc.identifier.issn | 2194-4288 | |
dc.identifier.scopus | 2-s2.0-85069858286 | |
dc.identifier.uri | https://doi.org/10.1002/ente.201900450 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14288/9039 | |
dc.identifier.wos | 476110900001 | |
dc.keywords | Carbon aerogels | |
dc.keywords | Cobalt | |
dc.keywords | N-doped carbon | |
dc.keywords | Oxygen reduction reaction | |
dc.keywords | Supercritical deposition high electrocatalytic activity | |
dc.keywords | Efficient electrocatalyst | |
dc.keywords | Graphene aerogel | |
dc.keywords | Bimetallic nanoparticles | |
dc.keywords | Supported nanoparticles | |
dc.keywords | CO/COOX nanoparticles | |
dc.keywords | Catalytic-activity | |
dc.keywords | Mesoporous carbon | |
dc.keywords | Cathode catalysts | |
dc.keywords | Nitrogen | |
dc.language.iso | eng | |
dc.publisher | Wiley-V C H Verlag Gmbh | |
dc.relation.ispartof | Energy Technology | |
dc.subject | Energy | |
dc.subject | Fuel | |
dc.title | Supercritical deposition coupled with ammonia treatment: a new route to co-promoted n-doped carbon aerogels with high oxygen reduction reaction activity | |
dc.type | Journal Article | |
dspace.entity.type | Publication | |
local.contributor.kuauthor | Ünsal, Seçil | |
local.contributor.kuauthor | Yağcı, Mustafa Barış | |
local.contributor.kuauthor | Bozbağ, Selmi Erim | |
local.contributor.kuauthor | Erkey, Can | |
local.publication.orgunit1 | GRADUATE SCHOOL OF SCIENCES AND ENGINEERING | |
local.publication.orgunit1 | Koç University Surface Science and Technology Center (KUYTAM) / Koç Üniversitesi Yüzey Teknolojileri Araştırmaları Merkezi (KUYTAM) | |
local.publication.orgunit1 | College of Engineering | |
local.publication.orgunit2 | Department of Chemical and Biological Engineering | |
local.publication.orgunit2 | Graduate School of Sciences and Engineering | |
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