A Bifunctional Perovskite Catalyst for Oxygen Reduction and Evolution

Authors

  • Dr. Jae-Il Jung,

    1. School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea) http://jpcho.com
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  • Dr. Hu Young Jeong,

    1. UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea)
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  • Jang-Soo Lee,

    1. School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea) http://jpcho.com
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  • Dr. Min Gyu Kim,

    Corresponding author
    1. Beamline Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784 (South Korea)
    • Min Gyu Kim, Beamline Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784 (South Korea)===

      Jaephil Cho, School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea) http://jpcho.com===

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  • Prof. Dr. Jaephil Cho

    Corresponding author
    1. School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea) http://jpcho.com
    • Min Gyu Kim, Beamline Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 790-784 (South Korea)===

      Jaephil Cho, School of Energy and Chemical Engineering, Ulsan National Institute of Science & Technology (UNIST), Ulsan 689-798 (South Korea) http://jpcho.com===

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  • This work was supported by the next generation battery R&D program of MOTIE/KEIT (10042575) and the BK21 Plus funded by the Ministry of Education, Korea (10Z20130011057).

Abstract

La0.3(Ba0.5Sr0.5)0.7Co0.8Fe0.2O3−δ is a promising bifunctional perovskite catalyst for the oxygen reduction reaction and the oxygen evolution reaction. This catalyst has circa 10 nm-scale rhombohedral LaCoO3 cobaltite particles distributed on the surface. The dynamic microstructure phenomena are attributed to the charge imbalance from the replacement of A-site cations with La3+ and local stress on Co-site sub-lattice with the cubic perovskite structure.

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