biostudies-literatureSzymaszek-Wawryca A"Excellence Initiative - Research University" for AGH University of Science and TechnologyMinisterio de Ciencia e Innovación (ES)Ministerio de Ciencia e InnovaciónNational Science Center10754https://www.ebi.ac.uk/biostudies/studies/S-EPMC9501588biostudies-literatureUnknown23(18)The catalytic performance of Fe-catalysts in selective catalytic reduction of nitrogen oxides with ammonia (NH<sub>3</sub>-SCR) strongly depends on the nature of iron sites. Therefore, we aimed to prepare and investigate the catalytic potential of Fe-MCM-22 with various Si/Fe molar ratios in NH<sub>3</sub>-SCR. The samples were prepared by the one-pot synthesis method to provide high dispersion of iron and reduce the number of synthesis steps. We have found that the sample with the lowest concentration of Fe exhibited the highest catalytic activity of ca. 100% at 175 °C, due to the abundance of well-dispersed isolated iron species. The decrease of Si/Fe limited the formation of microporous structure and resulted in partial amorphization, formation of iron oxide clusters, and emission of N<International journal of molecular sciencesCatalytic Performance and Sulfur Dioxide Resistance of One-Pot Synthesized Fe-MCM-22 in Selective Catalytic Reduction of Nitrogen Oxides with Ammonia (NH<sub>3</sub>-SCR)-The Effect of Iron Content.PMC9501588PID2020-112590GB-C21/AEI/10.13039/5011000110332020/37/N/ST5/00186"Excellence Initiative - Research University" for AGH University of Science and TechnologyMotak MSzymaszek-Wawryca ASwierczek KSamojeden BDiaz UDuraczynska DfalseCatalytic Performance and Sulfur Dioxide Resistance of One-Pot Synthesized Fe-MCM-22 in Selective Catalytic Reduction of Nitrogen Oxides with Ammonia (NH<sub>3</sub>-SCR)-The Effect of Iron Content.The catalytic performance of Fe-catalysts in selective catalytic reduction of nitrogen oxides with ammonia (NH<sub>3</sub>-SCR) strongly depends on the nature of iron sites. Therefore, we aimed to prepare and investigate the catalytic potential of Fe-MCM-22 with various Si/Fe molar ratios in NH<sub>3</sub>-SCR. The samples were prepared by the one-pot synthesis method to provide high dispersion of iron and reduce the number of synthesis steps. We have found that the sample with the lowest concentration of Fe exhibited the highest catalytic activity of ca. 100% at 175 °C, due to the abundance of well-dispersed isolated iron species. The decrease of Si/Fe limited the formation of microporous structure and resulted in partial amorphization, formation of iron oxide clusters, and emission of N<2022-01-01T00:00:00Z2022 Sep2025-04-22T04:06:38.441Z2025-04-05T20:55:36.51ZS-EPMC95015883614266610.3390/ijms231810754