| Effect of dopant valence on the oxygen desorption and oxygen permeability of SrCo0.4Fe0.5M0.1O3-δ （M -Ni,Al and Zr） mixed-conducting oxides |
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| 作者姓名： | Yan Jun He Xian Feng Chang Xue Liang Dong Chun Zhang Wan Qin Jin Nan Ping Xu |
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| 作者单位： | State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| 基金项目： | Acknowledgments This work is sponsored by the National Basic Research Program of China （No. 2003CB615702）, National Natural Science Foundation of China （No. 20576051, 20636020）, and Special Research Foundation for Doctoral Discipline of Higher Education （No. 20060291003）. |
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| 摘 要： | The effect of dopant valence on oxygen desorption and oxygen permeability of SrCo0.4Fe0.5M0.1O3-δ （M = Ni, Al and Zr） mixed-conducting oxides were investigated in detail by O2-TPD and oxygen permeation measurement. The SrCo0.4Fe0.5M0.1O3-δ for M = Fe, Ni, Al and Zr were denoted as SCF, SCFN, SCFA and SCFZ, respectively. O2-TPD analysis revealed that the amount of α oxygen desorption decreased with increasing the valance of doped metal elements （SCFN 〉 SCFA SCF 〉 SCFZ）. The oxygen permeation flux at the temperature ≈igher than 1148 K decreased in the order of SCFN 〉 SCF 〉 SCFZ 〉 SCFA. Single activation for oxygen permeation was observed for SCFZ oxide and the activation energies of SCF and SCFA change at around 1073 K, while the change temoerature of SCFN was about 1173 K.
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| 关 键 词： | 化合价 混合氧化物 氧吸附作用 氧渗透性 |
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