Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 13: Atmospheric Pressure Plasmas II
P 13.4: Talk
Wednesday, March 18, 2026, 17:15–17:30, KH 01.020
The Influence of Catalyst Structure on Plasma Properties in Plasma Catalysis — •Alexander Quack1, Lennard Buck1, Kerstin Sgonina1, and Jan Benedikt1,2 — 1Institute of Experimental and Applied Physics, Kiel University — 2Kiel Nano, Surface and Interface Science (KINSIS), Kiel University
In plasma catalysis, porous materials are often used to increase the catalyst surface area and number of active size. However, the plasma often can not reach these sites directly, limiting the transport of excited species from the plasma to the catalyst surface. Therefore, we investigate the influence of dielectric materials and porous structures of many sizes inside the plasma region and study the resulting modification on the formation, intensity and coverage of the plasma.
For the presented work, we use a custom-build reactor, which can be heated up to 600∘C and has a transparent driven electrode for optical analysis with a camera. Additionally, the plasma gap can be modified from 0.5 to 8 mm changing the special dimension of the discharge and altering the plasma properties. The plasma is created at about 20 kHz and 8-20 kVPP and analyzed with current-voltage measurements deriving the plasma power, capacitances and coverage. A gas mixture of H2:CO2 (3:1) is chosen to study the catalytic properties of the plasma with CH4 and CO as chemical products that are detected by mass spectrometry as residual gas analysis. As dielectric materials, we use ceramic (ZrO2) spheres of different sizes (0.7-2.5 mm) as model material and Co3O4 and CuZnO in forms of porous beads and powder as catalytic materials.
Keywords: Plasma Catalysis; Plasma Surface Interaction; Plasma Diagnostics; Carbon dioxide Hydrogenation; Catalyst Design