Highly active and humidity resistive perovskite LaFeO3 based catalysts for efficient ozone decomposition

doi:10.1016/j.apcatb.2018.09.041

	Highly active and humidity resistive perovskite LaFeO3 based catalysts for efficient ozone decomposition
	Gong, Shuyan 1,2; Xie, Zheng 1; Li, Weiman 1,2; Wu, Xiaofeng 1; Han, Ning 1,3; Chen, Yunfa 1,3
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2019-02-01
卷号	241 页码:578-587
关键词	Ozone decomposition Perovskite LaFeO3 Humidity resistance In-situ Raman spectroscopy Stability
ISSN号	0926-3373
DOI	10.1016/j.apcatb.2018.09.041
英文摘要	Nowadays, it is still challenging to prepare highly active O-3 decomposition catalyst, especially with high water resistance used in harsh environments such as high relative humidity (RH). Herein, perovskite LaFeO3 based catalysts are synthesized by a facile sol-gel method, which show far higher O-3 decomposition activity of 70-80% than the commonly used Fe2O3 counterpart of 0% at RH 90% and room temperature. Furthermore, 5% mol Ni is effectively doped into LaFeO3 substituting part of Fe as verified by X-ray diffraction and X-ray photoelectron spectroscopy, which enhances the RH resistance with a stable > 90% conversion efficiency on 1000 ppm O-3 at RH 90% and room temperature in a test period of 4.0 h. The temperature programmed desorption results show that the H2O desorption temperature decreases from 180 to 480 degrees C of Fe2O3 to < 100 degrees C for LaFeO3 and LaFe0.95Ni0.05O3, which contributes to the easy desorption of H2O and thus high RH resistance of these perovskite materials. Importantly, the in-situ Raman spectra show deformation of Fe2O3 in O-3 decomposition reaction at high RH, leading to accumulation of intermediate O-2(2-) and thus depression of catalytic activity. However, the perovskite materials show neither deformation nor O-2(2-) accumulation, corresponding well with the high activity at high RH. All these results show the potential of these highly active and RH resistive perovskite catalysts for decomposition of ozone under harsh environments.
资助项目	National Key R&D Program of China[2016YFC0207100] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB05050400] ; National Natural Science Foundation of China[51672273] ; State Key Laboratory of Multiphase Complex Systems[MPCS-2015-A-04]
WOS关键词	MANGANESE OXIDE CATALYST ; SITU RAMAN-SPECTROSCOPY ; ROOM-TEMPERATURE ; OXYGEN CARRIERS ; TOTAL OXIDATION ; BENZYL ALCOHOL ; AIR-POLLUTION ; GASEOUS OZONE ; ALPHA-FE2O3 ; CU
WOS研究方向	Chemistry ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000449444000061
资助机构	National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; State Key Laboratory of Multiphase Complex Systems
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/26619]
专题	中国科学院过程工程研究所
通讯作者	Han, Ning; Chen, Yunfa
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Gong, Shuyan,Xie, Zheng,Li, Weiman,et al. Highly active and humidity resistive perovskite LaFeO3 based catalysts for efficient ozone decomposition[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,241:578-587.
APA	Gong, Shuyan,Xie, Zheng,Li, Weiman,Wu, Xiaofeng,Han, Ning,&Chen, Yunfa.(2019).Highly active and humidity resistive perovskite LaFeO3 based catalysts for efficient ozone decomposition.APPLIED CATALYSIS B-ENVIRONMENTAL,241,578-587.
MLA	Gong, Shuyan,et al."Highly active and humidity resistive perovskite LaFeO3 based catalysts for efficient ozone decomposition".APPLIED CATALYSIS B-ENVIRONMENTAL 241(2019):578-587.