Preparation and Investigation of Iron–Cerium Oxide Compounds for NOx Reduction,Industrial & Engineering Chemistry Research

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Preparation and Investigation of Iron–Cerium Oxide Compounds for NOx Reduction
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-28 , DOI: 10.1021/acs.iecr.8b03472
Xueyan Hou ₁ , Junning Qian ₁ , Lulu Li ₁ , Fan Wang ₁ , Bin Li _{1,

2} , Fenglang He ₁ , Minguang Fan ₁ , Zhangfa Tong ₁ , Lihui Dong _{1,

2} , Lin Dong ₂

Affiliation

The work was focused on investigating how Fe-doped CeO₂ composites affect the physicochemical properties in relation to the NO + CO reaction. The coprecipitation method was adopted to prepare CeO₂–FeO_x mixed oxides. The NO + CO reaction as well as temperature-programmed reduction, N₂ physisorption, oxygen storage capacity, X-ray photoelectron spectroscopy, X-ray diffraction, and in situ Fourier transform infrared spectroscopy were used to characterize the resulting samples. These results implied that the appropriate doping amount of FeO_x would cause an obvious change on the CeO₂ structure and properties. Also, the catalyst with the ratio of Ce:Fe = 1:0.35 showed the best catalytic properties. In addition, during calcination, adding a few FeO_x molecules could benefit the formation of low-valence Fe to a larger extent. This synergetic effect contributed to the formation of a larger number of Fe²⁺ and oxygen vacancies.

中文翻译：

还原NO _x的铁-铈氧化物的制备与研究

这项工作的重点是研究掺Fe的CeO ₂复合材料如何影响与NO + CO反应有关的理化性质。采用共沉淀法制备了CeO ₂ -FeO _x混合氧化物。使用NO + CO反应以及程序升温还原，N ₂物理吸附，储氧量，X射线光电子能谱，X射线衍射和原位傅里叶变换红外光谱来表征所得样品。这些结果暗示适当的FeO _x掺杂量将引起CeO ₂的明显变化。结构和特性。另外，Ce∶Fe ＝ 1∶0.35的催化剂显示出最佳的催化性能。另外，在煅烧期间，添加一些FeO _x分子可在更大程度上有益于低价铁的形成。这种协同作用有助于形成大量的Fe ²⁺和氧空位。

更新日期：2018-11-29

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