Oxygen Reduction Catalysts Based on Iron and Cobalt Phthalocyanine Modified Shungite

dc.contributor.advisorMooste, Marek
dc.contributor.advisorTammeveski, Kaido
dc.contributor.authorTkesheliadze, Tinatin
dc.date.accessioned2021-05-27T10:50:17Z
dc.date.available2021-05-27T10:50:17Z
dc.date.issued2020
dc.description.abstractElectrocatalytic oxygen reduction reaction (ORR) activity was studied on natural shungite-based materials prepared by functionalisation with Fe- and Co-phthalocyanine (Pc) com-plexes via pyrolysis. Structural and elemental composition of the pristine and modified cat-alysts were studied using several physical characterisation methods. The ORR activity of the materials was assessed by the rotating disc electrode method in alkaline and acidic media, resulting in superior ORR performance of KOH-treated FePc modified shungite material in 0.1 M KOH solution. Stability testing performed on most active catalysts in alkaline media showed a high stability of the prepared shungite-based electrocatalysts. The testing in 0.5 M H2SO4 solution also revealed the superior ORR activity of KOH-treated FePc modified shungite material. In estonian: Käesolevas töös uuriti hapniku redutseerumist katalüsaatormaterjalidel, mis põhinesid püro-lüüsi teel valmistatud Fe- ja Co-ftalotsüaniiniga (Pc) modifitseeritud šungiidil. Valmistatud materjalide omadusi uuriti mitmete füüsikaliste karakteriseerimismeetoditega. Hapniku elektrokeemilist redutseerumist valmistatud materjalidel uuriti nii aluselises kui ka happeli-ses lahuses. Kõige aktiivsem hapniku redutseerumise katalüsaator aluselise keskkonna jaoks valmistati KOH lahuses töödeldud šungiidist, mis oli modifitseeritud FePc ühendiga. Sta-biilsustestid 0,1 M KOH lahuses näitasid valmistatud katalüsaatormaterjalide head stabiil-sust. Happelises keskkonnas tehtud eksperimendid näitasid samuti kõige paremat aktiivsust hapniku redutseerumiseks KOH lahuses töödeldud ja FePc ühendiga valmistatud materjalil.en
dc.identifier.urihttp://hdl.handle.net/10062/72084
dc.language.isoenget
dc.rightsembargoedAccesset
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/ee/
dc.subjectelectrocatalysisen
dc.subjectoxygen reduction reactionen
dc.subjectnon-precious metal catalysten
dc.subjectshungiteen
dc.subjectelektrokatalüüset
dc.subjecthapniku redutseerumineet
dc.subjectmitte-väärismetallkatalüsaatoret
dc.subjectšungiitet
dc.titleOxygen Reduction Catalysts Based on Iron and Cobalt Phthalocyanine Modified Shungiteen
dc.title.alternativeHapniku redutseerumine raud ja koobalt ftalotsüaniiniga modifitseeritud šungiidil põhinevatel katalüsaatormaterjalidelet
dc.typeinfo:eu-repo/semantics/bachelorThesiset

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