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AuthorGebauer, Christiandc.contributor.author
Date of accession2017-02-02T10:54:06Zdc.date.accessioned
Available in OPARU since2017-02-02T10:54:06Zdc.date.available
Year of creation2016dc.date.created
Date of first publication2017-02-02dc.date.issued
AbstractThe potential of alternative catalysts for application in the polymer electrolyte membrane (PEM) fuel cell relevant cathode reaction, the oxygen reduction reaction (ORR), was investigated using TiO2 based materials. Herein, those materials were used as catalysts itself, after modification with nitrogen, or as support materials for commonly used Pt nanoparticles, employing their non-corrosive nature, compared to carbon support materials, for an increase in catalyst durability. The oxides are synthesized by using a sol-gel route. Modification with nitrogen and carbon doping is achieved by thermal decomposition of urea and of the structure-directing agent P123 or by thermal treatment in ammonia atmosphere. Platinum nanoparticles are prepared by reduction of a PtIV salt in ethylene glycol and subsequently immobilized on the different support materials. Structural and electronic properties of the support materials and the resulting catalysts are characterized by various methods, including N2-sorption method, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. Latter is also the main tool to determine support induced electronic effects on the metal particle. These results and electrochemical / -catalytic characterization, performed in a rotating ring disk electrode (RRDE) configuration as well as in a differential electrochemical mass spectrometry (DEMS) set-up, of the support materials and of the platinum nanoparticle catalysts indicate distinct support effects in the catalysts, an ORR activity for the Pt-free catalysts and an enhanced catalyst stability.dc.description.abstract
Languageendc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandarddc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v3dc.rights.uri
KeywordORRdc.subject
KeywordTiO2dc.subject
KeywordTitaniumdioxidedc.subject
Dewey Decimal GroupDDC 540 / Chemistry & allied sciencesdc.subject.ddc
LCSHElectrocatalysisdc.subject.lcsh
LCSHReduction (Chemistry)dc.subject.lcsh
LCSHFuel cellsdc.subject.lcsh
TitleCharacterization and properties of titanium dioxide based materials as PEMFC cathode supports and catalystsdc.title
Resource typeDissertationdc.type
Date of acceptance2016-10-24dcterms.dateAccepted
RefereeBehm, Rolf Jürgendc.contributor.referee
RefereeHüsing, Nicoladc.contributor.referee
DOIhttp://dx.doi.org/10.18725/OPARU-4219dc.identifier.doi
PPN880441720dc.identifier.ppn
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-oparu-4258-7dc.identifier.urn
GNDElektrokatalysedc.subject.gnd
GNDRedoxreaktiondc.subject.gnd
GNDBrennstoffzelledc.subject.gnd
GNDTitandioxiddc.subject.gnd
GNDPlatindc.subject.gnd
FacultyFakultät für Naturwissenschaftenuulm.affiliationGeneral
InstitutionInstitut für Oberflächenchemie und Katalyseuulm.affiliationSpecific
InstitutionInstitut für Anorganische Chemie I (Materialien und Katalyse)uulm.affiliationSpecific
Shelfmark print versionW: W-H 14.995uulm.shelfmark
Grantor of degreeFakultät für Naturwissenschaftenuulm.thesisGrantor
DCMI TypeTextuulm.typeDCMI
TypeErstveröffentlichunguulm.veroeffentlichung
CategoryPublikationenuulm.category
Bibliographyuulmuulm.bibliographie


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