| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_전기화학 |
| 제목 |
Effective Formation of Fe-Nx Active Sites in Fe-N-C Catalysts Mediated by Mulitple Fe-N Coordinated Precursors |
| 초록 |
Fe-N-C catalysts have been intensitvely studied due to remarkable activity for electrochemical oxygen reduction reaction (ORR). Recently, a number of spectroscopic studies identify Fe-Nx coordinated structures as the most promising active sites. However, the influence of type of prcursors on formation of active sites is not well understood due to emphirical synthetic conditions. In this work, we employ phenanthroline isomers to reveal the correlation between precursor coordination state and active site formation during pyrolysis in Fe-N-C catalysts. Through detailed spectroscopic and electrochemical characterization, it is highlighted that use of precursors with multiple coordination, including bidentate coordination, between Fe and N atoms is highly critical for effective derivation of Fe-Nx active sites for highly active and stable ORR electrocatalysts. |
| 저자 |
유지문1, 김민형1, 안치영1, 장주혁2, 손윤준1, 신희종1, 강지호1, 강윤식2, 유성종2, 이국승3, 성영은1
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| 소속 |
1서울대, 2한국과학기술(연), 3포항가속기(연) |
| 키워드 |
Fe-N-C catalyst; Oxygen reduction reaction; Precursor; Active site formation; Coordination state
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| E-Mail |
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