20.500.12556/DiRROS-29385 Catalytic conversion of nonequilibrium hydrogen and nitrogen species from low-pressure inductively coupled plasma to ammonia Gas conversion between hydrogen (H2), nitrogen (N2), and ammonia (NH3) is a scientific topic of interest in both methods for low-temperature synthesis of ammonia and energy-efficient production of hydrogen for powering fuel cells. The efficiency of catalysts for ammonia synthesis at room temperature was evaluated. A mixture of hydrogen and nitrogen with a ratio in a broad range between 1.5:1 and 80:1 was passed through a plasma sustained by inductively coupled radio frequency discharge in the H mode at a power of 700 W and pressures between 40 and 100 Pa. Several catalysts were placed in the flowing afterglow where the H and N densities were of the order of 1021 m−3, and the conversion efficiency (η) was evaluated. The efficiency increased almost linearly with increasing enthalpy of nitride formation. The best results were observed for copper, for which the conversion was almost twice the value in the same system without the catalyst. The efficiency of NH3 production by the conversion of N atoms into NH3 molecules versus the gas mixture exhibited a broad maximum and was as large as η ≈ 29% in the mixture of hydrogen and nitrogen between 3:1 and 10:1. hydrogen production proizvodnja vodika true false true American Chemical Society ZDA Angleški jezik Slovenski jezik © 2026 The Authors. Neznano 2026-05-14 12:25:35 2026-05-14 12:25:35 2026-05-15 03:47:50 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Alenka Vesel, Gregor Primc, Miha Čekada, Gregor Dolanc, Miran Mozetič; Opis vira z dne 13. 5. 2026; str. A-H iss. Vol. 11 [in press] 2026 0000-00-00 Zaloznikova Objavljeno apc 2026-01-29 2026-04-08 2026-05-10 54 2470-1343 10.1021/acsomega.6c01120 277990147 https://pubs.acs.org/doi/10.1021/acsomega.6c01120 1 4004ec18-4f7f-11f1-8a5a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44028 RAZ_Zaplotnik_Rok_2026.pdf RAZ_Zaplotnik_Rok_2026.pdf 1 4D1413979FFAC38C591C6A7C193F6AD2 59ff223476744ea9fa6cf77e8757aaed2c7c0f6ef9eb8ece3a09e17e048b452f 8c995ff6-4f7f-11f1-8a5a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44029 Institut Jožef Stefan 0 0 0