Ultralow loading of nanostructured Mn species onto two-dimensional Co3O4 nanosheets for selective catalytic reduction of NOx with NH3

Abstract

We report a facile method for dispersing Mn species onto two-dimensional Co₃O₄ nanosheets at the nanoscale for the selective catalytic reduction (SCR) of NO_x with NH₃. In comparison with the reference catalysts with higher Mn loadings, the Mn/Co₃O₄ (0.8 wt%) catalyst exhibits improved catalytic activity and a high H₂O-resistance ability. Due to the strong interaction between cobalt and manganese oxides and the increased surface area of the Co₃O₄ nanosheets, the catalyst with an ultralow amount of Mn at the nanoscale possesses stronger reducibility, abundant Co³⁺ and surface oxygen species, which in turn enhance the NH₃-SCR activity.