【摘 要】
：
The aim of this work is to study the effect of Sr substitution on the redox properties and catalytic activity of La2-xSrxNiO4 (x = 0.0-1.2) for NO decomposition
【机 构】
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National Research Center of Chemical Fertilizer Catalysts,Changchun Institute of Applied Chemistry,C
【基金项目】
：
国家高技术研究发展计划(863计划);国家自然科学基金
论文部分内容阅读
The aim of this work is to study the effect of Sr substitution on the redox properties and catalytic activity of La2-xSrxNiO4 (x = 0.0-1.2) for NO decomposition. Results suggest that the x = 0.6 sample shows the highest activity. The characterization (TPD, TPR, etc.) of samples indicates that the x = 0.6 sample possesses suitable abilities in both oxidation and reduction, which facilitates the proceeding of oxygen desorption and NO adsorption. At temperature below 700℃, the oxygen desorption is difficult, and is the rate-determining step of NO decomposition. With the increase of reaction temperature (T ＞ 700℃), the oxygen desorption is favorable and, the active adsorption of NO on the active site (NO + Vo + Ni2+→NO--Ni3+)turns out to be the rate-determining step. The existence of oxygen vacancy is the prerequisite condition for NO decomposition, but its quantity does not relate much to the activity.
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