Abstract
Corich core–Ptrich shell/C prepared by thermal decomposition and chemical reduction methods were treated by 20% H2SO4 aqueous solution and used as the electrocatalysts for the oxygen reduction reaction (ORR). The particle size range of Corich core–Ptrich shell (molar ratio of 0.92:1) on carbon powder support decreased from 3–8 to 1–6 nm when the time for the electrocatalysts immersed and treated with 20% H2SO4 aqueous solution increased from 0 to 4 h. Using Corich core–Ptrich shell (molar ratio of 0.92:1)/C treated with 20% H2SO4 from 0 to 4 h as the working electrode, the open circuit potential of ORR in 0.5 M HClO4 aqueous solution increased from 0.9995 to 1.0155 V, and the current density, mass activity, and specific activity at the overpotential of 0.1 V increased from 0.619 mA cm−2, 6.184 A g−1, and 18.614 μA cm−2 to 0.912 mA cm−2, 15.544 A g−1, and 23.413 μA cm−2, respectively.
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The financial support of the National Science Council Republic of China (Project number: NSC 95-2120-M-011-002) and Tunghai University is acknowledged.
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Contribution to ICMAT 2007, Symposium K: Nanostructured and bulk materials for electrochemical power sources, July 1–6, 2007, Singapore.
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Lee, MH., Wang, PS. & Do, JS. Effect of acid treatment of Corich core–Ptrich shell/C electrocatalyst on oxygen reduction reaction. J Solid State Electrochem 12, 879–884 (2008). https://doi.org/10.1007/s10008-007-0477-z
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DOI: https://doi.org/10.1007/s10008-007-0477-z