Influence of Interaction Components on the NOx Adsorption Properties of Cu-Ba-Ce Composite Catalysts
Influence of Interaction Components on the NOx Adsorption Properties of Cu-Ba-Ce Composite Catalysts
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相互作用组分对Cu-Ba-Ce复合催化剂NOx吸附性能的影响
DOI：
10.1166/jnn.2019.16318
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发表时间：
2019
影响因子：
--
通讯作者：
Qiao Guanjun
中科院分区：
文献类型：
--
作者：
Cai Hao;Zhang Xiangzhao;Wang Pan;Li Kai;Shao Haicheng;Liu Guiwu;Qiao Guanjun
为了进一步研究铜-铈-钡复合氧化物催化剂中各组分的作用，采用柠檬酸法合成了一系列不同钡含量的无贵金属催化剂。用X射线衍射法、Brunauer-Emmett-Teller法、扫描电子显微镜、拉曼光谱和傅立叶变换红外光谱对催化剂进行了表征。采用NO氧化、NOx吸附和程序升温脱附等方法对催化剂进行了评价。结果表明，Ba2+含量对催化剂的性能有显著影响。随着Ba2+的加入，各组分之间的相互作用发生了很大的变化，从而使催化剂的微观结构和性能发生了明显的变化。总体上，Ba2+-Cu2+和Ba2+-Ce的相互作用不利于催化剂的吸附。碳酸钡的吸附性能优于其他两种成分。
For further investigating the role of components in copper–cerium–barium composite oxide catalysts, a series of noble metal-free catalysts with different barium contents were synthesized by citric acid method. The prepared catalysts were characterized by X-ray diffraction, Brunauer–Emmett– Teller method, scanning electron microscopy, Raman spectroscopy, and Fourier transform infrared spectroscopy. Catalysts were evaluated by NO oxidation, NO x adsorption, and NO x temperature-programmed desorption. The results showed that barium content significantly affected the catalysts’ properties. With barium addition, interactions among components considerably changed; hence, the microstructure and performance of catalysts were distinctly different. In general, the interactions of barium–copper and barium–cerium were not conducive to catalyst adsorption. Adsorption performance derived from barium carbonate was superior to those of the other two components.