2024-07-222024-07-222017-12-13LIMA, Thiago M. et al. Zirconia-supported cobalt catalysts: activity and selectivity in NO reduction by CO. ChemistrySelect, Weinheim, v. 2, n. 35, p. 11565-11573, 2017. DOI: 10.1002/slct.201702475. Disponível em: https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/slct.201702475. Acesso em: 5 jul. 2024.e- 2365-65492365-6549https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/slct.201702475Cobalt catalysts supported on tetragonal and monoclinic zirconia were prepared using a one-pot procedure through the incorporation of a Co3O4 colloidal suspension during the support synthesis and evaluated in the reaction of NO reduction by CO. A better dispersion of the active phase was obtained by this method when compared to the conventional impregnation one. Furthermore, the crystalline phase of zirconia in the supports had a crucial effect in the dispersion of the cobalt species, being that the pure tetragonal phase led to a higher dispersion of the active phase. The one-pot prepared tetragonal zirconia led to cobalt active species that consisted in well-dispersed small agglomerates of Co3O4 and Co2+ species as oxo-ions which displayed the best catalytic performance among the studied catalysts, with the highest NO conversion (75%) and high selectivity to N2 (85%) at 300 °C. These results show that the one-pot methodology employed in this work has a strong potential to produce suitable catalysts for the abatement of NOx emissions.engAcesso RestritoCobalt oxideColloidal suspensionNO reductionOne-pot ZirconiaZirconia-supported cobalt catalysts: activity and selectivity in NO reduction by COArtigo10.1002/slct.201702475