Molten Salt Synthesis of Strontium-Doped Lanthanum Manganite Nanoparticles with Enhanced Catalytic Performance for Toluene Combustion

Abstract

La[Formula: see text]SrxMnO[Formula: see text] (LSMO) and LaMnO[Formula: see text] (LMO) nanoparticle catalysts have been synthesized via a one-step molten salt route. It was found that the partial substitution of lanthanum by strontium had a promoting effect on the catalytic performance for toluene oxidation. Under the condition of toluene [Formula: see text][Formula: see text]ppm, toluene/O2[Formula: see text] and the space [Formula: see text][Formula: see text]mL/(g h), the temperature required for 50% and 90% toluene combustion conversion was 150[Formula: see text]C and 205[Formula: see text]C over LSMO catalyst, respectively. It is concluded that the oxygen vacancy, the molar ratio Mn[Formula: see text]/Mn[Formula: see text] on the surface and the specific surface area contribute to the improved catalytic performance of the LSMO nanoparticle materials via a one-step molten salt method.