Effect of support preparation with different concentration precipitant on the NOx storage performance of Pt/BaO/CeO2 catalysts

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Effect of support preparation with different concentration precipitant on the NOx storage performance of Pt/BaO/CeO2 catalysts
	Zhang, Yan; Yu, Yunbo; Shan, Wenpo; Lian, Zhihua; He, Hong
刊名	CATALYSIS TODAY
	2020
卷号	339 页码:135-147
关键词	NOx storage reduction Pt/BaO/CeO2 NaOH concentration Oxygen vacancies Rich duration
ISSN号	0920-5861
英文摘要	In this study, the CeO2 nanorods as the supports of Pt/BaO/CeO2 catalysts were synthesis by the alkali-assisted hydrothermal method in a solution containing different content of NaOH. Pt/BaO/CeO2 catalyst with 7.5M NaOH pre-added in the support preparation process showed higher NOx storage capacity and NOx removal efficiency than samples derived from other concentration NaOH. Moreover, even under shorter rich time (3s) and more lean-rich cycles (60), Pt/BaO/CeO2-7.5M still maintained above 80% NOx conversion from 250 to 450 degrees C, exhibiting good fuel economy and durability. A series of characterization techniques including XRD, N-2-adsorption, TEM, XPS, Raman, H-2-TPR, and NO2-TPD were conducted to investigate the physical, chemical properties. Combining the activity with the structure of catalysts, a linear relationship between the NOx storage capacity (NSC) of NSR catalysts and the amount of oxygen vacancies was drawn. Meanwhile, the strong synergetic effect among Pt and CeO2 attributed to the role of oxygen vacancies in anchoring the active component Pt, promoting the mobility of surface oxygen species, was also related to the NSC value of NSR catalysts. These results indicated that the oxygen vacancies were responsible for the excellent catalytic activity.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45072]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Zhang, Yan,Yu, Yunbo,Shan, Wenpo,et al. Effect of support preparation with different concentration precipitant on the NOx storage performance of Pt/BaO/CeO2 catalysts[J]. CATALYSIS TODAY,2020,339:135-147.
APA	Zhang, Yan,Yu, Yunbo,Shan, Wenpo,Lian, Zhihua,&He, Hong.(2020).Effect of support preparation with different concentration precipitant on the NOx storage performance of Pt/BaO/CeO2 catalysts.CATALYSIS TODAY,339,135-147.
MLA	Zhang, Yan,et al."Effect of support preparation with different concentration precipitant on the NOx storage performance of Pt/BaO/CeO2 catalysts".CATALYSIS TODAY 339(2020):135-147.