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Antimony-doped Bi0.5Sr0.5FeO3-δ as a novel Fe-based oxygen reduction electrocatalyst for solid oxide fuel cells below 600 °C

Abstract

The perovskite oxide Bi0.5Sr0.5Fe0.90Sb0.10O3-δ (BSFS) is evaluated as efficient Fe-based cathode for low-temperature solid oxide fuel cells (LT-SOFCs). The BSFS material possesses a single cubic perovskite structure. The Sb-dopping stratergy is proved to be benefit for the structure stability of pristine Bi0.5Sr0.5FeO3-δ. BSFS cathode shows efficient electrocatalytic activity for oxygen reduction reaction (ORR). The lowest polarization resistance (Rp) of 0.098 Ω cm2 is obtained and the anode supported fuel cell gives remarkable peak power density of 0.95 W cm2 at 600 oC, which is comparable to state-of-the-art Co-based materials. The prominent performance is ascribed to the comparable TEC value and large amount of oxygen vacancies generated at high temperatures. Moreover, BSFS cathode also exhibits excellent CO2 tolerence under the exposure to 10 vol.% CO2 at 600 oC for 24 h. These features stand out the potential applicability of BSFS material as a highly promising cathode for LT-SOFCs.

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Publication details

The article was received on 07 May 2018, accepted on 06 Jul 2018 and first published on 10 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04222E
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Antimony-doped Bi0.5Sr0.5FeO3-δ as a novel Fe-based oxygen reduction electrocatalyst for solid oxide fuel cells below 600 °C

    G. lei, Q. Li, L. SUN, T. Xia, L. Huo, H. Zhao and G. Jean-Claude, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04222E

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