Synthesis of MnO(OH) nanorods via hydrothermal method as efficient low-temperature SCR catalysts

Abstract

We conducted a hydrothermal reaction using lactic acid as a reducing agent and potassium permanganate. This reaction successfully produced MnO(OH) with a one-dimensional nanorod structure, and its XRD spectrum perfectly matched the standard reference. Despite the excellent low-temperature ammonia selective catalytic reduction (NH3-SCR) performance observed in manganese-based catalysts, there was no reported performance data for any type of MnOOH in NH3-SCR prior to our research. Our test results now reveal that MnO(OH) nanorods, synthesized using this method, consistently maintain an impressive 98.8 % NO conversion rate even at the low temperature of 80 °C. This finding is of significant importance for the advancement of low-temperature NH3-SCR catalysts.