CoFe prussian blue coordination compounds incorporating metallopolymers: Investigation of electrocatalytic water oxidation activities

Simple item page
buir.advisorKaradaş, Ferdi
dc.contributor.authorDemirkıran, Merve
dc.date.accessioned2016-04-18T11:31:15Z
dc.date.available2016-04-18T11:31:15Z
dc.date.copyright2016-02
dc.date.issued2016-02
dc.date.submitted2016-03
dc.departmentDepartment of Chemistryen_US
dc.descriptionAnkara : The Graduate School of Engineering and Science of Bilkent University, 2016.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2016.en_US
dc.descriptionIncludes bibliographical references (leaves 52-60).en_US
dc.description.abstractHydrogen economy, which depends on water and sunlight as energy source, needs to be implemented as an alternative to carbon based economy. For the development of a technology that incorporates hydrogen energy to our daily lives, it is required to split the water with the help of an efficient water oxidation catalyst. CoFe Prussian Blue analogues have recently been investigated as heterogeneous water oxidation catalysts. Even though they exhibit they exhibit high electrocatalytic activity in addition to superior stability in both acidic and neutral media low current densities were obtained with CoFe PB modified FTO electrodes due to their low surface coverage. This challenge could be overcome by developing novel synthetic methods that will enforce the formation of amorphous CoFe Prussian Blue analogues. Herein this thesis, pentacyanoferrate based metallopolymers were used as precursors to prepare amorphous Co-Fe analogues. The project focuses on the improving surface concentration by using Poly 4-vinyl pyridine (P4VP) not only as a capping ligand connected to pentacyanoferrate complexes but also as a surfactant to prevent the formation of long-range ordering between Co-Fe networks. Surface concentration was improved approximately seven fold, which resulted in an increase in the catalytic activity. A current density of 1 mA.cm-2 was obtained only at η = 510 mV while the same current density could be obtained only at higher overpotentials (>600 mV) with the previously studied Prussian Blue analogues. The stability of CoFe-PVP coated FTO electrodes were investigated before and after the electrocatalytic process using Infrared, XPS, and EDX studies. The results of this study indicate that the rich and diverse chemistry of pentacyanoferrates make them potential candidates for application in heterogeneous water oxidation catalysis.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityby Merve Demirkıranen_US
dc.format.extentxvii, 60 leaves :illustrations (some colour), charts.en_US
dc.identifier.itemidB152898
dc.identifier.urihttp://hdl.handle.net/11693/28933
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectWater Oxidation Catalysten_US
dc.subjectPrussian Blueen_US
dc.subjectamorphous structureen_US
dc.subjectcurrent densityen_US
dc.titleCoFe prussian blue coordination compounds incorporating metallopolymers: Investigation of electrocatalytic water oxidation activitiesen_US
dc.title.alternativeMetalpolimerlere birleştirilen CoFe Prusya mavisi koordinasyon bileşikleri: elektrokatalitik su oksidasyon aktivitelerinin incelenmesien_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Thesiscorrected05032016.pdf
Size:
2.48 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Dept. of Chemistry - Master's degree