乙醇燃料车尾气净化催化剂研究

Study of catalysts for complete oxidation of alcohol fueled car exhausts

制备了一种具有钙态矿结构的Ag修饰的La0.6Sr0.4MnO3催化剂,实验表明这种催化剂对低浓度乙醇完全氧化的催化活性高于负载型贵金属催化剂,O2-TPD谱表明,Ag+对La0.6Sr0.4MnO3表面的修饰可以增加催化剂表面O2-2/O-物种的量,从而有利于对乙醇的完全催化氧化.

A highly active Ag-modified La_(0.6)Sr_(0.4)MnO_3 catalyst with the perovskite-type structure has been designed and prepared.It is observed experimentally that this catalyst exhibits the activity significantly higher than that of supported precious metal catalysts.O_2-TPD shows that modification of Ag^+ to the surface of La_(0.6)Sr_(0.4)MnO_3 catalyst increases the relative content of the surface O^(2-)_2/O^- species on surface,which are highly reactive toward alcohols.