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聚集态的Fe氧化物在Fe/ZSM-5催化N2O直接分解中的作用

张博 ,  刘福东 ,  贺泓 ,  薛丽

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引用本文: 张博, 刘福东, 贺泓, 薛丽. 聚集态的Fe氧化物在Fe/ZSM-5催化N2O直接分解中的作用[J]. 催化学报, 2014, 35(12): 1972-1981. doi: 10.1016/S1872-2067(14)60184-4 shu
Citation:  Bo Zhang, Fudong Liu, Hong He, Li Xue. Role of aggregated Fe oxo species in N2O decomposition over Fe/ZSM-5[J]. Chinese Journal of Catalysis, 2014, 35(12): 1972-1981. doi: 10.1016/S1872-2067(14)60184-4 shu

聚集态的Fe氧化物在Fe/ZSM-5催化N2O直接分解中的作用

    通讯作者: 贺泓
  • 基金项目:

    国家高技术研究发展计划(863计划, 2013AA065301) (863计划, 2013AA065301)

    国家重点基础研究发展计划(973计划, 2010CB732304) (973计划, 2010CB732304)

    国家自然科学基金创新研究群体项目(51221892). (51221892)

摘要: 研究了以离子交换法制备的Fe/ZSM-5上聚合态的Fe氧化物(FeOx)在催化N2O直接分解中的作用.Fe/ZSM-5催化剂利用600-900 ℃的高纯Ar处理, 使催化剂中的FeOx发生聚合.利用一系列的表征手段(XRD, BET, DRIFTS, UV/vis-DRS, XAFS, N2O脉冲和O2-TPD)对催化剂进行了表征.结果发现, 分子筛骨架外的FeOx在Fe/ZSM-5催化N2O分解中起重要作用;通过研究高温处理的Fe/ZSM-5催化剂中不同FeOx的比例与催化剂活性的关系, 得到多核的FeOx是催化N2O分解的主要活性物种;并且, 无定形态的FeOx中键长较长的Fe-O键((Fe-O)2)是参与反应的重要物种.

English

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  • 收稿日期:  2014-05-14
  • 网络出版日期:  2014-06-27
通讯作者: 陈斌, bchen63@163.com
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