Oxygen reduction reaction and electrochemical properties of transition metal doped (Pr,Ba)Co2O5+δ

Kanghee Jo (조강희); Lee, Hee-Soo (이희수)

doi:10.6111/JKCGCT.2023.33.1.037

Oxygen reduction reaction and electrochemical properties of transition metal doped (Pr,Ba)Co2O5+δ

Journal of the Korean Crystal Growth and Crystal Technology
Abbr : J. Korean Cryst. Growth Cryst. Technol.
2023, 33(1), pp.37-44
DOI : 10.6111/JKCGCT.2023.33.1.037
Publisher : The Korea Association Of Crystal Growth, Inc.
Research Area : Engineering > Materials Science and Engineering
Received : January 4, 2023
Accepted : February 2, 2023
Published : February 28, 2023

Kanghee Jo ¹, Lee, Hee-Soo ¹

¹부산대학교 재료공학부

Accredited

ABSTRACT

Transition metal (Me = Cu, Fe, Ni) doped (Pr, Ba)Co2O5+δ (PBCO) material were investigated in terms of electronic structure change and electrochemical properties. It was confirmed that (Pr, Ba)(Co, Cu)O5+δ (PBCCu) and (Pr, Ba)(Co, Fe)O5+δ (PBCFe) showed cubic and orthorhombic structures, respectively, but (Pr, Ba)(Co, Ni)O5+δ (PBCNi) showed secondary phases. PBCCu has an average particle diameter of 1093 nm, and PBCO and PBCFe have an average particle diameter of 495.1 nm and 728 nm, respectively. The average oxidation values of B site ions in PBCMe were calculated to be 3.26 (PBCO), 2.48 (PBCCu), 3.32 (PBCFe), and valence band maximum (VBM) was -0.42 eV (PBCO), -0.58 eV (PBCCu), 0.11 eV (PBCFe). It is expected that PBCCu easily interacts with adsorbed oxygen due to the lowest oxidation value and the highest VBM. The polarization esistance was 0.91 Ωcm2 (PBCO), 0.77 Ωcm2 (PBCCu), 1.06 Ωcm2 (PBCFe) at 600°C, showing the lowest polarization resistance of PBCCu.

KEYWORDS

Transition metal doped (Pr, Ba)Co2O5+δ, Oxygen vacancy formation, Valence band structure, Oxygen reduction reaction

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Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Oxygen reduction reaction and electrochemical properties of transition metal doped (Pr,Ba)Co2O5+δ

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* References for papers published after 2023 are currently being built.

Journal of the Korean Crystal Growth and Crystal Technology 2023 KCI Impact Factor : 0.19

Oxygen reduction reaction and electrochemical properties of transition metal doped (Pr,Ba)Co2O5+δ

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