LaCoO3/tourmaline was prepared as catalysts on the methane catalytic combustion. As additive tourmaline, its effect on crystal growth and catalytic activity of LaCoO3, were investigated via X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), H2-temperature programmed reduction (H2-TPR) and catalyst evaluation techniques. SEM and TEM indicated that the spontaneous polarizability of tourmaline made LaCoO3 particles grow dispersedly on tourmaline, allevi-ated the agglomeration and exposed more reactive sites. It was a main influence leading to the improvement of catalysts activity, ex-posed via catalyst evaluation device. Among the different additive proportion of compound samples, the 2% tourmaline added La-CoO3 showed an obvious enhancement activity compared to non-tourmaline sample-the light-off temperature was 454 °C and CH4 reached the full conversion at 563 °C.
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