基金This work was supported by the National Natural Science Foundation of China (No.20973161 and No.11079033), the Ministry of Science and Technology of China (No.2010CB923302), the Fundamental Research Funds for the Central Universities, and the MPG-CAS partner group program.
基金supported by the National Natural Science Foundation of China (51072096)the National Basic Research Program of China (973 Program,2010CB732304)the National High Technology Research and Development Program of China (863 Program,2013AA065302)~~
文摘通过在Ce0.6Zr0.4O2载体上浸渍Pt(NO3)2制得Pt/Ce0.6Zr0.4O2催化剂,该催化剂在松散接触条件下,于NO + O2或O2气氛中均表现出比Pt/Al2O3更好的碳烟氧化性能.进一步研究表明,Pt/Ce0.6Zr0.4O2催化剂中的Pt与Ce0.6Zr0.4O2存在相互作用,使得催化剂在一定温度范围内对活性氧的利用率大为提高,从而促进了气氛中NO ? NO2的循环,乃至碳烟与NO2的反应和碳烟表面含氧中间物种的生成;更重要的是,这部分活性氧本身可加速含氧中间物种的分解.因此,在NO + O2的气氛中,Pt/Ce0.6Zr0.4O2催化剂的碳烟起燃温度比Pt/Al2O3降低了34 °C.
基金Supported by the National Natural Science Foundation of China(20077005 and 20573014)andthe Natural Science Foun-dation of Liaoning Province(20041072).