Dual-comb Spectroscopy of Ammonia Formation in Non-thermal Plasmas
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arXiv
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| Hauptverfasser: | , , , , , , , |
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| Format: | Preprint |
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2023
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| author | Sadiek, Ibrahim Fleisher, Adam J. Hayden, Jakob Huang, Xinyi Hugi, Andreas Engeln, Richard Lang, Norbert van Helden, Jean-Pierre H. |
| author_facet | Sadiek, Ibrahim Fleisher, Adam J. Hayden, Jakob Huang, Xinyi Hugi, Andreas Engeln, Richard Lang, Norbert van Helden, Jean-Pierre H. |
| contents | Plasma-activated chemical transformations promise the efficient synthesis of salient chemical products. However, the reaction pathways that lead to desirable products are often unknown, and key quantum-state-resolved information regarding the involved molecular species is lacking. Here we use quantum cascade laser dual-comb spectroscopy (QCL-DCS) to probe plasma-activated NH$_3$ generation with rotational and vibrational state resolution, quantifying state-specific number densities via broadband spectral analysis. The measurements reveal unique translational, rotational and vibrational temperatures for NH$_3$ products, indicative of a highly reactive, non-thermal environment. Ultimately, we postulate on the energy transfer mechanisms that explain trends in temperatures and number densities observed for NH$_3$ generated in low-pressure nitrogen-hydrogen (N$_2$-H$_2$) plasmas. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_05075 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dual-comb Spectroscopy of Ammonia Formation in Non-thermal Plasmas Sadiek, Ibrahim Fleisher, Adam J. Hayden, Jakob Huang, Xinyi Hugi, Andreas Engeln, Richard Lang, Norbert van Helden, Jean-Pierre H. Chemical Physics Plasma-activated chemical transformations promise the efficient synthesis of salient chemical products. However, the reaction pathways that lead to desirable products are often unknown, and key quantum-state-resolved information regarding the involved molecular species is lacking. Here we use quantum cascade laser dual-comb spectroscopy (QCL-DCS) to probe plasma-activated NH$_3$ generation with rotational and vibrational state resolution, quantifying state-specific number densities via broadband spectral analysis. The measurements reveal unique translational, rotational and vibrational temperatures for NH$_3$ products, indicative of a highly reactive, non-thermal environment. Ultimately, we postulate on the energy transfer mechanisms that explain trends in temperatures and number densities observed for NH$_3$ generated in low-pressure nitrogen-hydrogen (N$_2$-H$_2$) plasmas. |
| title | Dual-comb Spectroscopy of Ammonia Formation in Non-thermal Plasmas |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2312.05075 |