| 학회 |
한국화학공학회 |
| 학술대회 |
2012년 가을 (10/24 ~ 10/26, 부산 BEXCO) |
| 권호 |
18권 2호, p.2081 |
| 발표분야 |
에너지 |
| 제목 |
Shape- and Composition-Sensitive Activity of Pt and PtAu Catalysts for Formic Acid Electrooxidation |
| 초록 |
In this work, we report a comparative and systematic study on the variation of activity toward formic acid oxidation with different shapes and compositions of Pt-based nanostructures. Pt hollow nanospheres (Pt HNS), Pt nanotubes (Pt NT), and PtAu alloy nanotubes (PtAu NT) with controlled Pt:Au compositions are prepared via a galvanic replacement process using sacrificial Ag templates. Relative to the commercial Pt black and Pt/C nanoparticle catalysts, the hollow nanostructured Pt materials (Pt HNS, Pt NT) exhibit enhanced catalytic activities due to structural effects. Moreover, the bimetallic PtAu NT series shows improved catalytic activities over the monometallic Pt catalysts due to compositional effects. This study clearly demonstrates that the shape- and composition-dependent activities of the various nanostructured catalysts are exemplified by formic acid oxidation. This work was supported by the NRF (no. 20120005212) and the Global Frontier R&D Program (no. 0420-20110157) of the MEST, and the KETEP (no. 20093020030020-11-1-000 and no. 20103020030020-11-2-200). |
| 저자 |
김영민, 김형주, 김용석, 최승목, 서민호, 김원배
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| 소속 |
광주과학기술원 |
| 키워드 |
hollow nanostructure; Direct Formic Acid Fuel Cell; platinum-gold alloy; galvanic replacement reaction
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| E-Mail |
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| 원문파일 |
초록 보기 |
