Fei Jingyin, Xin Wenli, Liang Guozheng, Zhu Guangming, Ma Xiaoyan. Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α[J]. Chinese Journal of Chemical Physics , 2003, 16(5): 425-428. doi: 10.1088/1674-0068/16/5/425-428
Citation: Fei Jingyin, Xin Wenli, Liang Guozheng, Zhu Guangming, Ma Xiaoyan. Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α[J]. Chinese Journal of Chemical Physics , 2003, 16(5): 425-428. doi: 10.1088/1674-0068/16/5/425-428

Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α

doi: 10.1088/1674-0068/16/5/425-428
  • Received Date: 2002-09-28
  • The ytterbium doped perovskite-type strontium cerate(SrCe0.95Yb0.05O3-α)has been prepared by solid-state reactions and it’s structural and electrical characterization has been characterized using X-ray diffraction and AC impedance spectroscopy. X-ray power diffraction analysis shows that SrCe0.95Yb0.05O3-αhas a single phase of orthorhombic perovskite-type structure, and the results suggested thatYb3+substituted the position of Ce4+and formingoxygen vacancy. The electrical conductivitystudies ofSrCe0.95Yb0.05O3-αhave beenmade as a function oftemperature. Attemperature lower than 500 K, the ytterbium doped perovskite-type strontium cerate exhibits p-type conduction and the electric conduction is increasedwith increasingof temperature. However, at elevated temperatures and in hydrogen-containing atmospheres, it exhibits protonic conduction. At 800 K, the total conductivity is dominated by protonic conductivity, reaching a maximumvalue of 4.5 mS/cm. The proton migration mechanism could be proposed as“free”migration mechanism model, in which the proton moves by jumping between stationary host oxygen ions. Membranes based on dense SrCe0.95Yb0.05O3-αthin films can be expect to applied in fuel cells, chemical hydrogen pumps and hydrogen sensors.
  • 加载中
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Article Metrics

Article views(1071) PDF downloads(1080) Cited by()

Proportional views
Related

Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α

doi: 10.1088/1674-0068/16/5/425-428

Abstract: The ytterbium doped perovskite-type strontium cerate(SrCe0.95Yb0.05O3-α)has been prepared by solid-state reactions and it’s structural and electrical characterization has been characterized using X-ray diffraction and AC impedance spectroscopy. X-ray power diffraction analysis shows that SrCe0.95Yb0.05O3-αhas a single phase of orthorhombic perovskite-type structure, and the results suggested thatYb3+substituted the position of Ce4+and formingoxygen vacancy. The electrical conductivitystudies ofSrCe0.95Yb0.05O3-αhave beenmade as a function oftemperature. Attemperature lower than 500 K, the ytterbium doped perovskite-type strontium cerate exhibits p-type conduction and the electric conduction is increasedwith increasingof temperature. However, at elevated temperatures and in hydrogen-containing atmospheres, it exhibits protonic conduction. At 800 K, the total conductivity is dominated by protonic conductivity, reaching a maximumvalue of 4.5 mS/cm. The proton migration mechanism could be proposed as“free”migration mechanism model, in which the proton moves by jumping between stationary host oxygen ions. Membranes based on dense SrCe0.95Yb0.05O3-αthin films can be expect to applied in fuel cells, chemical hydrogen pumps and hydrogen sensors.

Fei Jingyin, Xin Wenli, Liang Guozheng, Zhu Guangming, Ma Xiaoyan. Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α[J]. Chinese Journal of Chemical Physics , 2003, 16(5): 425-428. doi: 10.1088/1674-0068/16/5/425-428
Citation: Fei Jingyin, Xin Wenli, Liang Guozheng, Zhu Guangming, Ma Xiaoyan. Preparation and Protonic Conduction Characterization of SrCe0.95 Yb0.05 O3-α[J]. Chinese Journal of Chemical Physics , 2003, 16(5): 425-428. doi: 10.1088/1674-0068/16/5/425-428

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return