稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
9期
855-859
,共5页
王赛飞%薛刚%梁金生%孟军平
王賽飛%薛剛%樑金生%孟軍平
왕새비%설강%량금생%맹군평
LaCoO3%tourmaline%composite%catalytic activity%rare earths
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.
