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用傅里叶变换漫反射红外光谱法研究了原位合成的不同硅铝比的Cu ZSM 5 /堇青石整体式催化剂上一氧化氮的吸附态 ,以及温度和一氧化氮浓度对吸附态的影响 .结果表明 ,铜在整体式催化剂中主要以二价铜离子的形式存在 ,未发现一氧化氮在一价铜离子上的特征吸收峰 ;由二价铜的一氧化氮吸附物种衍生的Cu2 +(O) (NO)是与活性密切相关的物种 .探讨了NO分解可能的反应机理
The adsorption states of nitric oxide on Cu ZSM 5 / cordierite monolithic catalysts with different Si / Al ratios synthesized in situ were investigated by Fourier transform infrared spectroscopy. The effects of temperature and concentration of nitric oxide on the adsorption state were also studied The results show that copper exists mainly in the form of divalent copper ion in the monolithic catalyst and no characteristic absorption peak of monovalent copper ion is found. The Cu2 + (O) (NO) is closely related to the activity of the species discussed possible mechanism of NO decomposition reaction