Highly efficient Pd catalysts loaded on La1-xSrxMnO3 perovskite nanotube support for low-temperature toluene oxidation

Perovskite oxides are among the most promising thermal catalysts for catalytic oxidation of volatile organic compounds due to their specific structures, low cost, and good activities in catalytic oxidation. In this work, we developed a nanocasting array method for preparing nanotube perovskite oxides (N-LMO) with high surface areas. N-L1-xSxMO (x = 0.2, 0.5, 0.8) samples were prepared by partly replacing lanthanum ions with strontium. Meanwhile, this process will increase the Mn4+/Mn3+ ratio. The precious metal palladium was loaded on the N-L0.8S0.2MO surface and used for low-temperature (T-90 = 166 degrees C) degradation under the feed gas (50 ppm toluene) stream containing 5 vol% of water. This was achieved due to the interaction between Pd and N-L0.8S0.2MO. Cycling experiments verify that the samples of 2 wt% Pd@N-L0.8S0.2MO has good stability. The excellent catalytic performance makes our strategy an effective method for developing high-efficiency catalysts for low-temperature catalytic oxidation. (C) 2021 Published by Elsevier B.V.