M/Al2O3-CeO2 (M = Pt-Ru, Ru, and Pt) catalysts were prepared using an impregnation method. Their catalytic performance in catalytic wet air oxidation (CWAO) of methylamine was compared. The catalysts were characterized using temperature-programmed reduction, X-ray photoelectron spec-troscopy, X-ray diffraction, transmission electron microscopy, N2 adsorption, and CO chemisorption. The experimental results indicated that the dispersion of active species in the Pt-Ru/Al2O3-CeO2 catalyst was greatly improved by the introduction of Pt; therefore, its catalytic performance was significantly enhanced. Temperature-dependent activity showed hysteresis over the catalysts, indi-cating that CWAO of methylamine followed a chemisorption mechanism.%采用浸渍法制备了M/Al2O3-CeO2(M = Pt-Ru, Ru, Pt)催化剂,并将其用于甲胺的催化湿式氧化反应(CWAO)。结果表明, Pt-Ru/Al2O3-CeO2具有最佳活性和选择性。运用程序升温还原、X射线光电子能谱、X射线衍射、透射电子显微镜、N2吸附和CO化学吸附等技术对催化剂的物化性质进行了表征。 Pt组分的引入可有效提高双金属催化剂活性组分的分散度,从而明显提高了其催化性能。升降温过程中总有机碳(TOC)转化率与N2选择性迟滞效应表明,甲胺CWAO遵循化学吸附-脱附机理。
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