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

摘要

La1-xSrxMnO3-partial derivative (LSMO) and LaMnO3+partial derivative (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 concentration = 1000 ppm, toluene/O(2)molar ratio = 1/200 and the space velocity = 20000 mL/(g h), the temperature required for 50% and 90% toluene combustion conversion was 150 degrees C and 205 degrees C over LSMO catalyst, respectively. It is concluded that the oxygen vacancy, the molar ratio Mn4+/Mn3+ 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.