| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.1796 |
| 발표분야 |
에너지/환경 |
| 제목 |
Pt nanowires prepared via a ploymer template method: its promise toward high Pt-loaded electrocatalysts for methanol oxidation |
| 초록 |
Platinum nanowires were prepared via a template-synthesis method by electro-deposition of platinum within pores of a track-etched polycarbonate membrane, followed by chemical etching to separate the Pt nanowires from the polymer. The structure and morphology of the Pt nanowires were characterized by XRD and TEM, revealing a polycrystalline phase with nanowire dimension up to 6 μm long and ca. 30 nm of diameter. The unsupported Pt nanowires showed better electrochemical mass activities over the methanol electrooxidation than supported or unsupported Pt nanoparticles under the high Pt content loaded conditions that is typically required for direct methanol fuel cells. This enhancement could be rationalized by its unique physicochemical and electrical properties arising from the inherent anisotropic one-dimensional nanostructure, such as charge transfer facilitation by reducing number of particle interfaces and more efficient use of Pt by alleviating fraction of embedded catalysts. |
| 저자 |
최승목, 김재홍, 정주용, 윤은유, 김원배
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| 소속 |
광주과학기술원 |
| 키워드 |
Pt nanowire; electrocatalyst; nanoparticle; DMFC; polycarbonate template; Pt loading
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| E-Mail |
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| 원문파일 |
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