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题名: A temperature-programmed-reduction study on La1-xSrxCrO3 and surface-ruthenium-modified Lal-xSrxCrO3
作者: Yan, Aiyu;  Liu, Bin;  Tu, Baofeng;  Dong, Yonglai;  Cheng, Mojie
通讯作者: 程谟杰
关键词: (La, Sr) CrO3 ;  lanthanum chromites ;  ruthenium ;  TPR ;  solid oxide fuel cells
刊名: JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY
发表日期: 2007-02-01
DOI: 10.1115/1.2393308
卷: 4, 期:1, 页:79-83
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 3
项目归属: 302
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: A series of La1-xSrxCrO3 (0 <= x <= 0.3) composite oxides were prepared by a modified citric method. These perovskite oxides were further modified with Ru through impregnation. X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and temperature-programmed-reduction (TPR) techniques were adopted to investigate the properties of both the as-prepared perovskite oxides and the surface-Ru-modified La1-xSrxCrO3 samples. XPS results indicated the existence of Cr6+ ions in the fresh samples and transformed to Cr3+, after reduction. The hydrogen consumed by these perovskite oxides during TPR increased with the Sr doping, which was more than twice of the theoretical value according to Kroger-Vink notation. The reduction temperature of Cr ions of Ru/La1-xSrxCrO3 significantly decreased with an increase of the Ru loading. A small reduction peak at similar to 540 degrees C, which was not shifted by increasing Ru loadings, was observed and could be ascribed to the reduction of trace chromate phases. Oil all TPR profiles of the three doped perovskites with unity of the A-site and B-site ratio, the reduction of Ru species could not be observed at low Ru loadings (0.05% and 0.1%). A reduction peak from RuO2 Particles appeared at temperatures prior to the perovskite reduction on the TPR plots of modified La0.9Sr0.1CrO3 and La0.8Sr0.2CrO3 with high Ru loading (0.5% and 1%, respectively), but it did not occur with the Ru modified La0.7Sr0.3CrO3 in the investigated Ru loading range. The TPR results of the Ru modified La0.8Sr0.2Cr0.95O3 depicted that some Ru ions might be stabilized due to the incorporation into the oxide.
关键词[WOS]: OXIDE FUEL-CELLS ;  EARTH METAL (MG ;  INTERMEDIATE-TEMPERATURE ;  CATALYTIC PROPERTIES ;  LANTHANUM CHROMITE ;  ANODE MATERIALS ;  METHANE ;  PEROVSKITES ;  OXIDATION ;  SOFCS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000244772200010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99517
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, Fuel Cell R&D Ctr, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Univ Thessalia, Sch Engn, Dept Mech Engn, Volos 38334, Greece

Recommended Citation:
Yan, Aiyu,Liu, Bin,Tu, Baofeng,et al. A temperature-programmed-reduction study on La1-xSrxCrO3 and surface-ruthenium-modified Lal-xSrxCrO3[J]. JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY,2007,4(1):79-83.
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