| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 봄 (04/22 ~ 04/24, 제주 ICC) |
| 권호 |
21권 1호, p.1002 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Highly Active and Durable Co-N-C Electrocatalysts Synthesized Using Exfoliated Carbon Nitride Nanosheets |
| 초록 |
Pt-free electrocatalysts for oxygen reduction reaction (ORR) with high electrocatalytic activity/durability and low price are desirable for the future commercial applications of proton exchange membrane fuel cell (PEMFC) devices. However, the design and fabrication of such material systems remain a significant challenge. Here we report the preparation of Co-N-C nanocomposites synthesized by employing exfoliated graphitic carbon nitride layers functionalized with transitional metal ions. The synthesized products show highly porous and interconnected nanostructures. This electrocatalyst has displayed a very efficient ORR performance with an onset-potential (0.87 V) and half-wave-potential (0.80 V) close to that of commercial Pt and remarkable durability (18.8 mV shift after 7,000 cycles under 0.1 M KOH condition). The extraordinary ORR performance stems from strong synergistic effect originating from (i) highly exposed catalytically-active sites generated by introduction of exfoliation of g-C3N4 into nanosheets, (ii) hierarchical porous structure of the nanocomposite film, and (iii) electrically conductive network. |
| 저자 |
박민정1, 이진희2, 유성종2, 장종현2, 김형준2, 남석우1, 윤창원1, 김진영2
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| 소속 |
1KIST / UST, 2KIST |
| 키워드 |
PEMFC; ORR; exfoliation; g-C3N4; Co-N-C
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| E-Mail |
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| 원문파일 |
초록 보기 |
