Synergy of DBD plasma and Fe‐based catalyst in NH₃ decomposition: Plasma enhancing adsorption step

Abstract

The synergy between catalyst and plasma has dramatically improved the efficiency of some plasma chemical processes. In this paper, the role of the electronically excited state NH 3 (NH 3 *) in the synergy of a DBD plasma and a Fe‐based catalyst for NH 3 decomposition has been studied by in situ optical emission spectra diagnostics, as well as adsorption and desorption experiments. Results reveal that, the NH 3 * species could adsorb on the catalyst surface with higher adsorption capacity and stronger strength in comparison with ground‐state NH 3 . The ammonia conversion increased by nearly 40% due to the contribution of NH 3 * species. Here, the acceleration of the surface adsorption step with excited reactants is proved to be another role of plasma in synergy with heterogeneous catalyst.