Influence of Calcination Temperature on Electrochemical Properties of Perovskite Oxide Nanofiber Catalysts

Ji-Woo Park, Jeeyoung Shin () and Young-Wan Ju ()
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Ji-Woo Park: Department of Chemical Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea
Jeeyoung Shin: Department of Mechanical Systems Engineering, Sookmyung Women’s University, Seoul 04310, Republic of Korea
Young-Wan Ju: Department of Chemical Engineering, College of Engineering, Wonkwang University, Iksan 54538, Republic of Korea

Energies, 2023, vol. 16, issue 13, 1-11

Abstract: Energy conversion and storage systems have recently attracted significant attention owing to increasing environmental and energy problems. However, the slow kinetics of the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) render their commercialization difficult. Many studies are being conducted to replace precious metal catalysts that have high activity for the ORR and OER but have scarcity and low stability. In this study, Sm 0.5 Sr 0.5 CoO 3 (SSC) nanofibers were fabricated via the electrospinning of non-precious metal-based perovskite oxides to replace precious metal catalysts. In addition, the properties and electrochemical performance of SSC fibers synthesized at different calcination temperatures were evaluated. The small crystallite size, high specific surface area, abundant oxygen vacancies, and high ORR/OER activity suggest that SSC800 hollow fibers are optimal bifunctional catalysts.

Keywords: calcination; electrospinning; oxygen reduction reaction (ORR); oxygen evolution reaction (OER); perovskite oxide (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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