Plasma-Surface Interaction in Plasma Catalysis*

A recent focus in the field of low-temperature plasmas is the integration of plasmas with catalysis to store renewable energy in chemical forms, a process that could significantly aid the electrification of industry in response to the climate crisis. While combining traditional catalysts with non-equilibrium plasmas has shown promising synergies, most studies are still empirical. Research suggests that atmospheric pressure plasmas, with their unique non-equilibrium properties and surface interactions, can enhance classical catalysis. However, understanding the underlying mechanisms is challenging, as the diagnostics and analysis of these reactors are complex.

This presentation will concentrate on clarifying fundamental processes to deepen our understanding of plasma interface physics responsible for plasma catalytic performance. We will focus on the design and diagnostics of atmospheric pressure non-equilibrium plasmas to untangle elemental plasma physical processes. We will cover the fundamental principles and explore various applications such as biocatalysis, gas conversion, and catalyst surface modification for processes like electrolysis. Theoretical and experimental research in the field will be discussed, along with the current limitations and challenges. We will emphasize the role of charge carriers and reactive species, as well as temperature and excitation frequency.