August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【602】Influence of the tungsten surface chemical state on the ammonia formation using low-pressure N2-H2 plasmas

Sep 2, 2021, 5:30 PM
Room E

Room E

Talk Applied Physics and Plasma Physics Applied Physics and Plasma Physics


Dr Rodrigo Antunes (University of Basel)


In this contribution, we discuss the catalytic formation of NH3 using radiofrequency (RF) N2-H2 plasmas and a tungsten (W) foil. A parametric study was done at various RF powers (30–300 W), discharge pressures (2–5 Pa), gas compositions (10–90% N2) and discharge temperatures (< 673 K). NH3 generally increased with the electron density and/or electron temperature, whereas the discharge temperature had a minor effect. We observed no impact on NH3 after contaminating the W surface with H2, N2 and O2. Instead, coating the W foil with a nm-thick boron layer led to a reduction of ammonia by half, possibly due to the formation of B-H bonds.

Primary authors

Dr Rodrigo Antunes (University of Basel) Mr Roland Steiner (University of Basel) Mr Kunal Soni (University of Basel) Dr Laurent Marot (University of Basel) Dr Carlos Romero-Muñiz (Universidad Pablo de Olavide) Prof. Ernst Meyer (University of Basel)

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