| 학회 |
한국화학공학회 |
| 학술대회 |
2014년 봄 (04/23 ~ 04/25, 창원컨벤션센터) |
| 권호 |
20권 1호, p.839 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Hot Electron Effect on Metal-Semiconductor Schottky Nanocatalysts |
| 초록 |
Among the multicomponent nanostructured materials, hybrid nanocatalysts consisting of metal-semiconductor junctions offer an interesting platform to investigate the role of metal-oxide interfaces and hot electron flows in heterogeneous catalysis. In this study, we report that hot electrons generated upon photon absorption impact the catalytic activity of CO oxidation. In case of Pt-CdSe-Pt nanodumbbells, it exhibited a higher turnover frequency by a factor of two during irradiation by light with energy higher than the bandgap of CdSe, while the turnover rate on bare Pt nanoparticles didn’t depend on light irradiation [1]. Pt nanoparticles (NPs) deposited on a GaN substrate under light irradiation exhibit changes in catalytic activity of CO oxidation that depends on the type of doping of the GaN[2]. We also found that the catalytic activity of Au NPs supported on CeO2 decrea ses during light irradiation although it show some difference with their size. These results imply that hot electron flows generated during light irradiation influence the catalytic activity of CO oxidation, leading to potential applications as a hot electron-based catalytic actuator. [1] S. M. Kim et al, Nano Lett. 13, 1352 (2013), [2] S. M. Kim et al, Faraday Discuss. 162, 355 (2013) |
| 저자 |
김선미1, 이선주2, 김상훈3, 송현준2, 박정영1
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| 소속 |
1KAIST EEWS 대, 2KAIST 화학부, 3KIST |
| 키워드 |
Hot electron; Catalytic activity; Metal-oxide interface; CO oxidation
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| E-Mail |
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| 원문파일 |
초록 보기 |
