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Electronic structure of atomically dispersed supported iridium catalyst controls iridium aggregation

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dc.contributor.coauthorHoffman, Adam S.
dc.contributor.coauthorAkgül, Deniz
dc.contributor.coauthorBabucci, Melike
dc.contributor.coauthorAviyente, Viktorya
dc.contributor.coauthorGates, Bruce C.
dc.contributor.coauthorBare, Simon R.
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.kuauthorÖztulum, Samira Fatma Kurtoğlu
dc.contributor.kuauthorUzun, Alper
dc.contributor.schoolcollegeinstituteCollege of Engineering
dc.contributor.schoolcollegeinstituteGRADUATE SCHOOL OF SCIENCES AND ENGINEERING
dc.contributor.schoolcollegeinstituteResearch Center
dc.date.accessioned2024-11-09T13:48:16Z
dc.date.issued2020
dc.description.abstractSupported iridium complexes, Ir(C2H4)2/support, were characterized by X-ray absorption spectroscopy during a temperature ramp to 120 °C in flowing H2. Iridium in complexes bonded to weak and moderate electron-donor supports, SiO2and ?-Al2O3, underwent aggregation, forming nanoparticles and clusters, respectively. When the support was a strong electron-donor (MgO), iridium remained site-isolated. Density functional theory calculations confirm the dependence of iridium-support bond strength on the support's electron-donor character. Coating the SiO2-supported complexes with 1- n-ethyl-3-methyl-imidazolium acetate enhanced electron density on the iridium, hindering its aggregation. These results demonstrate opportunities for stabilizing atomically dispersed supported noble metals under reducing conditions by choice of support/ionic liquid sheath combinations.
dc.description.fulltextYES
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue21
dc.description.openaccessYES
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipUnited States Department of Energy (DOE)
dc.description.sponsorshipUniversity of California
dc.description.sponsorshipKoç University TÜPRAŞ Energy Center (KUTEM)
dc.description.sponsorshipMETU Prof. Dr. Mustafa N. Parlar Education and Research Foundation’s 2019 Research Incentive Award
dc.description.sponsorshipTARLA
dc.description.versionAuthor's final manuscript
dc.description.volume10
dc.identifier.doi10.1021/acscatal.0c03909
dc.identifier.embargoNO
dc.identifier.filenameinventorynoIR02918
dc.identifier.issn2155-5435
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-85095606724
dc.identifier.urihttps://doi.org/10.1021/acscatal.0c03909
dc.identifier.wos589939900002
dc.keywordsAtomically dispersed metal
dc.keywordsCatalyst stability
dc.keywordsIonic liquid sheath
dc.keywordsMetal aggregation
dc.keywordsMetal sintering
dc.keywordsSingle-site metal
dc.keywordsSupported metal
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS)
dc.relation.grantnoDE-FG02-04ER15513
dc.relation.grantnoDE-AC02-76SF00515
dc.relation.ispartofACS Catalysis
dc.relation.urihttp://cdm21054.contentdm.oclc.org/cdm/ref/collection/IR/id/9565
dc.subjectChemistry
dc.titleElectronic structure of atomically dispersed supported iridium catalyst controls iridium aggregation
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorÖztulum, Samira Fatma Kurtoğlu
local.contributor.kuauthorUzun, Alper
local.publication.orgunit1GRADUATE SCHOOL OF SCIENCES AND ENGINEERING
local.publication.orgunit1College of Engineering
local.publication.orgunit1Research Center
local.publication.orgunit2KUYTAM (Koç University Surface Science and Technology Center)
local.publication.orgunit2KUTEM (Koç University Tüpraş Energy Center)
local.publication.orgunit2Department of Chemical and Biological Engineering
local.publication.orgunit2Graduate School of Sciences and Engineering
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