Multidimensional Spectroscopy Diagnostics of Plasma-Assisted Catalysis of Ammonia Reactions*

The research focuses on gaining practical experience with plasma systems at Princeton so that new multidimensional spectroscopic techniques can be used to optimize plasma-assisted catalysis for ammonia reactions. The primary goal is to understand the mechanisms underlying this process, which is currently less energy-efficient than the traditional Haber-Bosch process. By recreating a plasma system at Spelman, we aim to conduct nonlinear and multidimensional laser spectroscopy experiments to investigate both the synthesis and decomposition reactions of ammonia during plasma-assisted catalysis. Key aspects of the research include exploring variables such as the concentration of ammonia, the use of either nitrogen or helium plasma, adjustments to the high-voltage power supply, and variations in catalysts and electrode configurations. Observations focus on measuring the rate of ammonia synthesis and/or decomposition via pressure changes and recording optical emission spectra. By examining these variables, we hope to gain control over the reaction rate under different conditions. Nonlinear and multidimensional spectroscopy can help detect various species involved in the reactions at different points in the plasma. Optimizing the process for energy-efficient ammonia synthesis and potentially contributing to cleaner ammonia production.