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P: Fachverband Plasmaphysik
P 10: Poster Session I
P 10.1: Poster
Dienstag, 1. April 2025, 16:15–18:15, ZHG Foyer 1. OG
Development of a planar dielectric barrier discharge for plasma and surface studies — •A.A. Ben Yaala1, R. Antunes1, T. Höschen1, S. Buchberger1, A. Meindl1, A. Hecimovic1, and U. Fantz1,2 — 1Max Planck Institute for Plasma Physics (IPP), 85748 Garching b. München, Germany — 2University of Augsburg, 86149 Augsburg, Germany
The growing demand for ammonia in fertilizers, chemical industry and energy storage drives the need for production methods compatible with an electrified energy system. Plasma-catalysis offers a promising alternative to the traditional Haber-Bosch process, with potential for decentralization and renewable energy integration. The Dielectric Barrier Discharge (DBD) is the most extensively studied plasma discharge for ammonia synthesis due to its operating temperatures, which facilitate catalyst activation and improve reaction selectivity. While plasma-catalysis synergism in DBD has been demonstrated in several works, the detailed plasma-surface interactions remain an underexplored area. In this contribution, a newly developed planar DBD reactor, which permits an easier access to plasma and surface diagnostics, will be presented. This planar DBD is assembled in a setup with in-vacuo access to X-ray Photoelectron Spectroscopy (XPS), whereby surface characterization of a catalytic material deposited on the ground electrode can be done without breaking the vacuum. Preliminary work on formation of NH3 in N2-H2 plasmas as well as surface analysis of the exposed electrode will be presented.
Keywords: Plasma; Catalysis; XPS; Ammonia; DBD