Berlin 2024 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 107: Nanostructured Surfaces and Thin Films
O 107.6: Vortrag
Freitag, 22. März 2024, 11:45–12:00, MA 042
A plasma process to enhance electrode performance for large scale hydrogen production — •Timo Wagner1, Nicolas Wöhrl1, Vineetha Vinayakumar2, Christian Marcks3, Anna Mechler3, Doris Segets2, and Axel Lorke1 — 1Faculty of Physics and CENIDE, University Duisburg-Essen, Germany — 2Particle Science and Technology (IVG-PST) and CENIDE, University of Duisburg-Essen — 3AVT.ERT, RWTH Aachen University
In the context of H2Giga, a flagship project by the German Federal Ministry of Education and Research (BMBF) focused on hydrogen, we devised a plasma treatment for industry-relevant material systems. A very optimized substrate for electrolysis is Nickel Foam. Nickel foams offer a substantial specific surface area, and are widely used in academic research. Though, their higher cost and handling challenges make them less ideal for industrial use compared to bulk nickel plates. With this plasma process we could improve the electrochemical performance of Nickel plate electrodes notably, while also significantly improving the mechanical stability of the electrodes, thus increasing electrode lifetime. During this process, the surface of the sample undergoes a significant restructuring towards a hierarchical porous morphology. Nitrification can be observed by different methods, like XPS, XRD and EDX. This hierarchical structuring can also be observed on different substrate materials, e.g. Copper. Furthermore, we could successfully scale the plasma process from the lab scale of 1cm2 sample area to an industry testing scale of 100cm2.
Keywords: Plasma; Hydrogen; Microwave; Nitrogen; Nickel