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| Type |
Poster Presentation |
| Area |
전기화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
ELEC.P-506 |
| Subject |
The Effect of Halide on the Pt Nanoparticles and Their Electrocatalytic Performance for Oxygen Reduction Reaction |
| Authors |
박현욱, 박아현, 정종운, 권영욱*
성균관대학교 화학과, Korea
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| Abstract |
In the present work, we have synthesized Pt/C_KX (X = I, Br and Cl) samples in which 5 ~10 nm sized Pt nanoparticles (NPs) on a carbon support by an one-pot ultrasound-assisted polyol synthesis (UPS) method and studied the halide effects on Pt NPs of electrocatalytic performance for oxygen reduction reaction (ORR). In order to prepare Pt/C_KX (X = I, Br and Cl) samples, Pt(acac)2, KX (X = I, Br and Cl) and carbon support were dispersed in ethylene glycol and irradiated by ultrasound for 3 h. Based on the structural characterization data, we found that Pt/C_KX samples have narrow size distribution and well-dispersed on carbon support. Electrocatalytic performance of samples was investigated by rotating disk electrode (RDE) measurement. Compared with commercial Pt/C, electrochemical surface areas (ECSAs) and ORR activity of Pt/C_KI sample are inferior to that of commercial Pt/C in acid media. We assumed that it could be caused by poisoning of iodide from KI resulting in block the surface of Pt NPs. Interestingly, ORR activity of Pt/C_KBr sample is superior to that of commercial Pt/C in acid media. It means that bromide can lead to the enhanced electrocatalytic activity in ORR. Therefore, we found that the effect of halide on the Pt NPs are different in each type of halide. In conclusion, we demonstrated that the halide effects on Pt NPs can increase or decrease the electrocatalytic performance and durability. |
| E-mail |
phu9355@nate.com |
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119th General Meeting of the KCS