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dc.contributor.advisorÖzensoy, Emrah
dc.contributor.authorKarakurt, Bartu
dc.date.accessioned2020-06-22T11:57:13Z
dc.date.available2020-06-22T11:57:13Z
dc.date.copyright2020-06
dc.date.issued2020-06
dc.date.submitted2020-06-22
dc.identifier.urihttp://hdl.handle.net/11693/53661
dc.descriptionCataloged from PDF version of article.en_US
dc.descriptionThesis (M.S.): Bilkent University, Department of Chemistry, İhsan Doğramacı Bilkent University, 2020en_US
dc.descriptionIncludes bibliographical references (leaves 73-81).en_US
dc.description.abstractFormic acid (FA) is an environmentally friendly hydrogen-based energy vector that can be obtained from renewable biomass feedstocks. However, catalytic decomposition of FA involves two different competing chemical pathways called dehydration and dehydrogenation. Thus, molecular level studies focusing on the selective catalytic FA dehydrogenation are essential for establishing structure-reactivity relationships which can be used in order to increase the catalytic dehydrogenation selectivity. In the current work, effects of Bronsted and Lewis bases on catalytic FA dehydrogenation selectivity were studied under ultra-high vacuum (UHV) conditions on an atomically well-defined Pd(111) single crystal model catalyst surface by using temperature programmed desorption/temperature programmed reaction spectroscopy (TPD/TPRS), X-Ray photoelectron spectroscopy (XPS) and low energy electron diffraction (LEED) techniques. Doubly-deuterated FA (DCOOD) was used as the FA source, while ammonia and manganese oxide were chosen as the model Bronsted and Lewis bases. Adsorption and subsequent surface decomposition reaction of DCOOD on Pd(111) showed that model catalyst was not totally selective towards dehydrogenation. Functionalizing the Pd(111) surface with ammonia suppressed the FA dehydration and boosted the dehydrogenation pathway, where positive influence of ammonia on FA dehydrogenation selectivity decayed when ammonia coverage was greater than 1 ML. A boost in hydrogen generation was observed in the catalytic FA dehydrogenation on manganese oxide-deposited Pd(111) surface (at sub-monolayer manganese oxide regime) as compared to that of a clean Pd(111) model catalyst. It was found out that manganese oxide can enhance FA dehydrogenation by acting as a promoter and/or catalytically contributing to the reaction depending on the oxidation state composition.en_US
dc.description.statementofresponsibilityby Bartu Karakurten_US
dc.format.extentxv, 85 leaves : charts (color) ; 30 cm.en_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectBronsted baseen_US
dc.subjectLewis baseen_US
dc.subjectFormic aciden_US
dc.subjectDehydrogenationen_US
dc.subjectPd(111)en_US
dc.subjectModel catalysten_US
dc.titleEffects of Bronsted and Lewis bases on formic acid dehydrogenation selectivity of Pd(111) single crystal model catalysten_US
dc.title.alternativeBronsted ve Lewis bazlarının Pd(111) tek kristal model katalizörünün formik asit dehidrejenasyon seçiciliğine olan etkilerien_US
dc.typeThesisen_US
dc.departmentDepartment of Chemistryen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US
dc.identifier.itemidB160314
dc.embargo.release2020-12-19


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