Cu–ZSM-5, Cu–ZSM-11, and Cu–ZSM-12 catalysts for direct NO decomposition
Cu–ZSM-5, Cu–ZSM-11, and Cu–ZSM-12 catalysts for direct NO decomposition
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DOI：
10.1016/j.catcom.2006.02.019
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发表时间：
2006-09
影响因子：
3.7
通讯作者：
M. Kustova;A. Kustov;S. Christiansen;K. Leth;S. B. Rasmussen;C. Christensen
中科院分区：
文献类型：
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作者：
M. Kustova;A. Kustov;S. Christiansen;K. Leth;S. B. Rasmussen;C. Christensen
多年来，Cu-ZSM-5被认为是直接分解NO的独特催化剂。在此，发现Cu-ZSM-11和Cu-ZSM-12的活性都是Cu-ZSM-5的约两倍。这种差异归因于几乎完全位于直沸石孔中的活性位点。原位EPR结果表明，较高的活性与这些网站的可访问性改善。因此，很明显，与以前的观察相反，Cu-ZSM-5的特殊孔结构不是NO分解催化活性的决定性因素。
Cu–ZSM-5 has for many years been recognized as a unique catalyst for direct NO decomposition. Here, it is discovered that both Cu–ZSM-11 and Cu–ZSM-12 are about twice as active as Cu–ZSM-5. This difference is attributed to the active sites located almost exclusively in the straight zeolite pores. In situ EPR results suggest that higher activity is related with improved accessibility of these sites. Thus, it is clear that contrary to previous observations, the special pore structure of Cu–ZSM-5 is not a decisive factor for catalytic activity in NO decomposition.