Publication:
Ionic liquid sheath stabilizes atomically dispersed reduced graphene aerogel-supported iridium complexes during ethylene hydrogenation catalysis

dc.contributor.coauthorHoffman, Adam S.
dc.contributor.coauthorGates, Bruce C.
dc.contributor.coauthorBare, Simon R.
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.kuauthorJalal, Ahsan
dc.contributor.kuauthorÖztulum, Samira Fatma Kurtoğlu
dc.contributor.kuauthorÜnal, Uğur
dc.contributor.kuauthorUzun, Alper
dc.contributor.kuauthorYalçın, Kaan
dc.contributor.kuauthorZhao, Yuxin
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-10T00:08:04Z
dc.date.issued2022
dc.description.abstractAn atomically dispersed reduced graphene aerogel (rGA)-supported iridium catalyst having reactive ethylene ligands was synthesized at an iridium loading of 9.9 wt % and coated with an ionic liquid, 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]). Continuous-scan X-ray absorption spectra demonstrated that the iridium remained site-isolated in flowing equimolar C2H4 and H-2 during a temperature ramp to 100 degrees C. The data further showed the lack of detectable iridium aggregation when the feed was H-2-rich or even pure H-2 at 100 degrees C. An Arrhenius plot determined for ethylene hydrogenation catalysis with the sample in flowing equimolar ethylene and hydrogen showed no variation in the apparent activation energy at temperatures up to 100 degrees C, confirming that the active sites remained intact at the higher temperatures. The results point to opportunities for overcoming the stability limitations of atomically dispersed supported noble metal catalysts by choice of electron-donor supports and ionic liquid sheaths.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue19
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [217M547]
dc.description.sponsorshipKoc University TUPRAS Energy Center (KUTEM)
dc.description.sponsorshipU.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-AC02-76SF00515]
dc.description.sponsorshipDOE BES, Chemical Sciences, Geosciences, and Biosciences Division [DE-FG02-04ER15513] The work performed at Koc University was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) (217M547) and Koc University TUPRAS Energy Center (KUTEM). Work at the Stanford Synchrotron Radiation Lightsource (SSRL) of the SLAC National Accelerator Laboratory was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Contract DE-AC02-76SF00515 and by Co-ACCESS, supported by the DOE BES, Chemical Sciences, Geosciences, and Biosciences Division, which also supported the work at the University of California (DE-FG02-04ER15513). The authors acknowledge beamtime at SSRL Beamline 2-2.
dc.description.volume14
dc.identifier.doi10.1002/cctc.202200553
dc.identifier.eissn1867-3899
dc.identifier.issn1867-3880
dc.identifier.quartileQ2
dc.identifier.scopus2-s2.0-85137049248
dc.identifier.urihttps://doi.org/10.1002/cctc.202200553
dc.identifier.urihttps://hdl.handle.net/20.500.14288/16877
dc.identifier.wos859197400001
dc.keywordsGraphene aerogel
dc.keywordsSupported iridium complexes
dc.keywordsIonic liquid
dc.keywordsX-ray absorption spectroscopy
dc.keywordsStability X-ray
dc.keywordsSingle
dc.keywordsAtoms
dc.keywordsSelectivity
dc.keywordsSites
dc.language.isoeng
dc.publisherWiley
dc.relation.ispartofChemcatchem
dc.subjectChemistry
dc.subjectPhysical chemistry
dc.titleIonic liquid sheath stabilizes atomically dispersed reduced graphene aerogel-supported iridium complexes during ethylene hydrogenation catalysis
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorÖztulum, Samira Fatma Kurtoğlu
local.contributor.kuauthorYalçın, Kaan
local.contributor.kuauthorJalal, Ahsan
local.contributor.kuauthorZhao, Yuxin
local.contributor.kuauthorUzun, Alper
local.contributor.kuauthorÜnal, Uğur
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Engineering
local.publication.orgunit1College of Sciences
local.publication.orgunit1Research Center
local.publication.orgunit2Department of Chemical and Biological Engineering
local.publication.orgunit2Department of Chemistry
local.publication.orgunit2KUTEM (Koç University Tüpraş Energy Center)
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
local.publication.orgunit2Graduate School of Sciences and Engineering
relation.isOrgUnitOfPublication035d8150-86c9-4107-af16-a6f0a4d538eb
relation.isOrgUnitOfPublicationc747a256-6e0c-4969-b1bf-3b9f2f674289
relation.isOrgUnitOfPublication3fc31c89-e803-4eb1-af6b-6258bc42c3d8
relation.isOrgUnitOfPublication6ce65247-25c7-415b-a771-a9f0249b3a40
relation.isOrgUnitOfPublicationd41f66ba-d7a4-4790-9f8f-a456c391209b
relation.isOrgUnitOfPublication.latestForDiscovery035d8150-86c9-4107-af16-a6f0a4d538eb
relation.isParentOrgUnitOfPublication8e756b23-2d4a-4ce8-b1b3-62c794a8c164
relation.isParentOrgUnitOfPublicationaf0395b0-7219-4165-a909-7016fa30932d
relation.isParentOrgUnitOfPublication434c9663-2b11-4e66-9399-c863e2ebae43
relation.isParentOrgUnitOfPublicationd437580f-9309-4ecb-864a-4af58309d287
relation.isParentOrgUnitOfPublication.latestForDiscovery8e756b23-2d4a-4ce8-b1b3-62c794a8c164

Files