考察了Pd、Pt、Pd-Rh和Pt-Rh对天然气汽车尾气净化催化剂的影响.制备了以La-Al2O3、La-Al2O3+Ce2O-ZrO2和La-Al2O3+CeO2-ZrO2-MnOx为载体的天然气汽车尾气净化钯催化剂.结果表明,Pd/Al2O3+CeO2-ZrO2-MnOx催化剂能极大地降低CH4的起燃温度并显著改善催化剂的反应性能.该催化剂经1000℃水热老化后,CH4的起燃温度仅上升了40℃,表现出优异的抗老化性能.
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