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