Weidler, Natascha (2017)
Plasma-enhanced chemical vapor deposition of cobalt-based catalysts for the oxygen evolution reaction.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
In this thesis a plasma-enhanced chemical vapor deposition system has been installed to synthesize transition metal oxide/hydroxide flms as catalysts for the oxygen evolution reaction (OER). First, the infuence of various deposition parameters like the substrate temperature, the operation mode (thermal vs. plasma) and the type of reactive gas (oxygen vs. air) on the electrochemical activity has been investigated in detail for single metal oxide/hydroxide flms. It turned out, that especially the choice of reactive gas has a great impact on the resulting oxidation state and surface composition. While CoOx(OH)y flms were deposited when air was used as a reactive gas, the use of oxygen as a reactive gas lead to the deposition of CoOx. By measuring XPS from before and after the electrochemical characterization, a correlation between the change of oxidation state and the resulting electrochemical activity has been identifed. Finally, Co-based bimetallic catalysts, CoMOx and CoMOx(OH)y (M=Ni, Fe, Cu), were deposited and the effect of the admixture of the second metal on the electronic structure and activity was studied.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2017 | ||||
Autor(en): | Weidler, Natascha | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Plasma-enhanced chemical vapor deposition of cobalt-based catalysts for the oxygen evolution reaction | ||||
Sprache: | Englisch | ||||
Referenten: | Jaegermann, Prof. Wolfram ; Kramm, Prof. Ulrike | ||||
Publikationsjahr: | 31 Mai 2017 | ||||
Ort: | Darmstadt | ||||
Datum der mündlichen Prüfung: | 21 April 2017 | ||||
URL / URN: | http://tuprints.ulb.tu-darmstadt.de/6257 | ||||
Kurzbeschreibung (Abstract): | In this thesis a plasma-enhanced chemical vapor deposition system has been installed to synthesize transition metal oxide/hydroxide flms as catalysts for the oxygen evolution reaction (OER). First, the infuence of various deposition parameters like the substrate temperature, the operation mode (thermal vs. plasma) and the type of reactive gas (oxygen vs. air) on the electrochemical activity has been investigated in detail for single metal oxide/hydroxide flms. It turned out, that especially the choice of reactive gas has a great impact on the resulting oxidation state and surface composition. While CoOx(OH)y flms were deposited when air was used as a reactive gas, the use of oxygen as a reactive gas lead to the deposition of CoOx. By measuring XPS from before and after the electrochemical characterization, a correlation between the change of oxidation state and the resulting electrochemical activity has been identifed. Finally, Co-based bimetallic catalysts, CoMOx and CoMOx(OH)y (M=Ni, Fe, Cu), were deposited and the effect of the admixture of the second metal on the electronic structure and activity was studied. |
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Alternatives oder übersetztes Abstract: |
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URN: | urn:nbn:de:tuda-tuprints-62576 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie | ||||
Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
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Hinterlegungsdatum: | 11 Jun 2017 19:55 | ||||
Letzte Änderung: | 19 Jun 2017 08:06 | ||||
PPN: | |||||
Referenten: | Jaegermann, Prof. Wolfram ; Kramm, Prof. Ulrike | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 21 April 2017 | ||||
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