کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7714528 | 1497438 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of redox stability and electrical conductivity by doping various metals on ceria, Ce1âxMxO2âδ (M = Ni, Cu, Co, Mn, Ti, Zr)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhancement of redox stability and electrical conductivity by doping various metals on ceria, Ce1âxMxO2âδ (M = Ni, Cu, Co, Mn, Ti, Zr) Enhancement of redox stability and electrical conductivity by doping various metals on ceria, Ce1âxMxO2âδ (M = Ni, Cu, Co, Mn, Ti, Zr)](/preview/png/7714528.png)
چکیده انگلیسی
Various metal oxide materials have been actively investigated to improve energy efficiency as exhaust-catalyst as well as electrodes in electrochemical devices such as fuel cells, ceramic sensors, photo-catalyst etc. Ceria-based materials are of great interest due to their wide applications; such as redox or oxygen storage promoter in automotive catalyst and solid state conductor in fuel cells. Here we report redox and electrical properties for Ce1âxMxO2âδ (M = Ni, Cu, Co, Mn, Ti, Zr) by X-ray diffraction (XRD) and simultaneous thermo-gravimetric analysis (TGA). Among various system, Ce1âxCuxO2âδ and Ce1âxNixO2âδ indicated relatively reversible redox behavior, although Cu2+ and Ni2+ had limited solid solubility in CeO2. The enhancement of oxygen carrier concentration and electrical conductivity as well as electrochemical activity in the ceria lattice by the introduction of small amounts transition metal cations have been considered in this study. Ce0.7Cu0.3O2âδ showed about 1015 μmol[O2]/g of oxygen storage capacity (OSC) with high redox stability at 700 °C. We also demonstrated that Ce0.9Ni0.1O2âδ was used as an anode of the YSZ electrolyte supported SOFC single cell; the maximum power density was 0.15 W/cm2 at 850 °C with hydrogen fuel.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 35, 21 September 2015, Pages 12003-12008
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 35, 21 September 2015, Pages 12003-12008
نویسندگان
Jae-ha Myung, Tae Ho Shin, Xiubing Huang, George Carins, John T.S. Irvine,