Properties of La0.9Sr0.1MnO3 and tourmaline compound catalytic materials for methane combustion

Abstract A novel catalytic material La 0.9 Sr 0.1 MnO 3 and tourmaline compound catalytic material was synthesized in the base of traditional catalytic material La 0.9 Sr 0.1 MnO 3 which exhibited excellent catalytic activity for methane combustion. Different contents of tourmaline were added to give a series of La 0.9 Sr 0.1 MnO 3 and tourmaline catalytic material through a sol-gel method. Samples above were characterized and analyzed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller method (BET), temperature programmed reduction (TPR), catalytic activity test and contact angle test. The as-prepared sample with 2% ( m/m ) tourmaline showed good homogeneity surface morphology and displayed the optimal catalytic activity. The light-off temperature reduced by 10 °C and the T 90 decreased by 15 °C. In addition, the mechanism of the reinforcement of catalytic activity was explored.