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设计了一系列的对比实验 ,利用 XRD、XPS、TPR、EXAFS等技术 ,系统研究了 Cu Cl/γ- Al2 O3上的 NO脱除反应过程 .结果发现 ,Cu Cl/γ- Al2 O3样品暴露在空气中 ,表面被部分氧化生成 Cu Cl2 及 Cu O等 .在高温处理和反应过程中 ,造成样品表面氯的损失 ,同时生成更多的 Cu O.因而重新还原处理后测活性时 ,得到高分散的金属铜 ,使样品的 NO分解活性提高 .但由于 NO对低价铜有很强的氧化作用 ,NO可通过氧化还原反应转化为 N2 ,同时将 Cu0 及 Cu+ 氧化为无活性的 Cu2 + ,从而引起 NO转化活性下降 .
A series of comparative experiments were designed and the removal of NO from CuCl / γ-Al2 O3 was systematically investigated by XRD, XPS, TPR and EXAFS techniques. It was found that the CuCl / γ-Al2 O3 samples were exposed to In the air, the surface is partially oxidized to form CuCl 2, CuO, etc. During the high-temperature treatment and reaction, chlorine is lost on the surface of the sample and more Cu O. is formed, and thus the highly dispersed Of the metal copper, so that the NO decomposition activity of the sample increased.But due to the strong oxidation of NO on low-priced copper, NO can be converted to N2 by redox reaction, while Cu0 and Cu + into inactive Cu2 +, thus Causing a decrease in NO conversion activity.