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OALib Journal期刊
ISSN: 2333-9721
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Pt/Ce0.6Zr0.4O2催化剂催化氧化碳烟过程中活性氧对NO-NO2循环及表面含氧物种的分解作用
DOI: 10.1016/S1872-2067(14)60004-8, PP. 407-415
Keywords: 铂催化剂,铈锆复合氧化物,碳烟氧化,一氧化氮-二氧化氮循环,表面含氧物种
Abstract:
？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℃.
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