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学科主题: 物理化学
题名: Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite
作者: Zhang Xiaojing1;  Li Huaju1;  Li Yong1;  Shen Wenjie1
通讯作者: 申文杰
关键词: perovskite ;  lanthanum ferrite ;  substitution ;  reducibility ;  carbon monoxide oxidation ;  methane combustion
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2012-07-01
DOI: 10.1016/S1872-2067(11)60388-4
卷: 33, 期:7, 页:1109-1114
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 501
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Partial substitution of La3+ by Sr2+ in LaFeO3 resulted in significant changes in its structure and catalytic activity. The perovskite structure was changed from orthorhombic in LaFeO3 to nearly cubic in La0.8Sr0.2FeO3. Replacement of La3+ by Sr2+ induced a positive charge deficiency that was compensated for by the oxidation of some Fe3+ to Fe4+ and the generation of oxygen vacancies, which greatly promoted the reducibility of the perovskite. La0.8Sr0.2FeO3 gave considerably enhanced activity in CO oxidation and methane combustion because the oxygen vacancies accelerated the dissociation of gaseous oxygen on the surface in CO oxidation and facilitated the diffusion of lattice oxygen from the bulk to the surface during CH4 combustion.
关键词[WOS]: AUTOMOTIVE-EMISSIONS CONTROL ;  METHANE COMBUSTION ;  SURFACE-PROPERTIES ;  TOTAL OXIDATION ;  OXIDES ;  REDOX ;  FE ;  PERFORMANCE ;  REDUCTION ;  STABILITY
语种: 英语
WOS记录号: WOS:000306676600007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/117694
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Zhang Xiaojing,Li Huaju,Li Yong,et al. Structural Properties and Catalytic Activity of Sr-Substituted LaFeO3 Perovskite[J]. CHINESE JOURNAL OF CATALYSIS,2012,33(7):1109-1114.
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