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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-633 |
| Subject |
Effect of synthetic methods for the ternary Pd based alloy catalyst on the activity towards oxygen reduction reaction |
| Authors |
Dohyung Kim, Bongho Lee, Eunae Lee, Chanho PAK*
Graduate Program of Energy Technology, Gwangju Institute of Science and Technology, Korea
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| Abstract |
Many researchers have been investigated about Pd-based catalysts that have a good activity of oxygen reduction reaction (ORR). However, Pd has five times lower ORR activity than Pt. To improve the ORR activity, most of the research is focused on the development of Pd-based alloy catalysts. In this study, in order to enhance ORR activity, ternary Pd based alloy catalysts were made with Ir and Y. The Y has very low reduction standard potential, -2.37V, and exists to ion, Y3+, at normal stage in aqueous solution, so it is too hard to be reduced in order to make alloy catalyst. The ternary Pd based alloy catalysts, therefore, was prepared by electron beam reduction method, which is more facile than solution reduction or gas reduction methods to reduce metallic ions. The Pd4Ir/C, Pd4IrY0.1/C, and Pd4IrY0.5C have been synthesized by two synthesis method such as the electron beam reduction method and polyol method. In XRD patterns, a ratio of 1st and 2nd intense peaks obtained from all of the catalysts commensurates to a face-centered cubic structure of Pd, which is the dominant element in the alloy. Toward ORR, the catalysts made by electron beam showed better catalytic activity than those by polyol method. And the Pd4IrY0.1/C has the best ORR activity but both Pd4IrY0.5¬/C catalysts show lower on-set potential than Pd4Ir/C. |
| E-mail |
kimdh4785@gist.ac.kr |
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121st General Meeting of the KCS