20.500.12556/RUL-189653 A supportive support the important role of porous supports in plasma-catalytic ammonia synthesis Plasma catalysis is a promising method for synthesizing ammonia, utilizing dielectric barrier discharge (DBD) to supply the energy required for N≡N bond cleavage. Although efficient, the process is hindered by ammonia dissociation in the plasma zone, which must be prevented. Micro- and mesoporous frameworks can mitigate this issue by protecting the formed ammonia from immediate decomposition. However, their effects extend beyond porosity, as the presence of acidic sites significantly improves ammonia yields, refuting the idea of a simple spectator or inert support. Here, we systematically evaluate five different MCM materials—MWW zeolites MCM-22, MCM-36, and MCM-56, as well as mesoporous silicas MCM-41 and MCM-48—both as pristine materials and as supported NiO catalysts for plasma-catalytic ammonia synthesis. To quantify the importance of the acidic properties of the catalyst, experiments were conducted at constant discharge power and under a power-swing regime. In power-swing experiments, NiO/MCM-56, which has the highest amount of moderate acidic sites, achieved 1.5 times higher ammonia concentration than the best-performing catalysts at constant discharge power. We show that tailored acidic properties of the support further enhance the shielding effect, enabling efficient sorption-enhanced plasmacatalytic ammonia synthesis by using plasma power modulation rather than external heating for ammonia desorption. Three distinct properties required of a “good catalyst” are identified: porous structure, active phase location and, most importantly, surface acidity. ammonia plasma catalysis sorption supported catalyst power-swing kemijska tehnologija kataliza amonijak sinteza true false true Angleški jezik Slovenski jezik Članek v reviji 2026-10-12 11:28:44 2026-10-12 11:28:44 2026-10-13 04:16:20 0000-00-00 00:00:00 2026 0 0 Str. 9887-9901 iss. 11 Vol. 16 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 54 2155-5435 10.1021/acscatal.6c00096 279939587 a-supportive-support-the-important-role-of-porous-supports-in-plasma-catalytic-ammonia-synthesis.pdf a-supportive-support-the-important-role-of-porous-supports-in-plasma-catalytic-ammonia-synthesis.pdf 1 AC31C9B492BABB2B91CA9EA84E198003 68a52a278f5a265000cd48650e690838885a210f51c91566119b95d4b50b3033 93afeb52-c61f-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250349 https://pubs.acs.org/accacs/article/16/11/9887/5149282/A-Supportive-Support-The-Important-Role-of-Porous 0 75f373e3-c61f-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250347 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0