Weidler, Natascha (2017)
Plasma-enhanced chemical vapor deposition of cobalt-based catalysts for the oxygen evolution reaction.
Technische Universität Darmstadt
Ph.D. Thesis, Primary publication
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Item Type: | Ph.D. Thesis | ||||
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Type of entry: | Primary publication | ||||
Title: | Plasma-enhanced chemical vapor deposition of cobalt-based catalysts for the oxygen evolution reaction | ||||
Language: | English | ||||
Referees: | Jaegermann, Prof. Wolfram ; Kramm, Prof. Ulrike | ||||
Date: | 31 May 2017 | ||||
Place of Publication: | Darmstadt | ||||
Date of oral examination: | 21 April 2017 | ||||
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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URN: | urn:nbn:de:tuda-tuprints-62576 | ||||
Classification DDC: | 500 Science and mathematics > 540 Chemistry | ||||
Divisions: | 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Surface Science |
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Date Deposited: | 06 Jun 2017 13:17 | ||||
Last Modified: | 28 Jul 2020 07:46 | ||||
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/6257 | ||||
PPN: | 403992052 | ||||
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