| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 봄 (05/01 ~ 05/03, 부산 벡스코(BEXCO)) |
| 권호 |
23권 1호 |
| 발표분야 |
(콜로이드·계면화학) 다기능성 연성재료 및 응용 |
| 제목 |
금속수산화물 나노시트를 이용한 스피넬 코발트 산화물 나노큐브 합성 |
| 초록 |
We developed a novel synthetic process for crystalline spinel Co3O4 nanocubes by topochemical reaction of exfoliated Co(OH)2 nanosheet which shows unique nanoscopic nature; a larger surface area of active hydroxide layers and a much narrower oxidation-reduction for divalent Co ions in hydroxide layer compared to bulk Co(OH)2. Our approach doesn't require additional high-temperature calcination for increasing crystallinity and organic stabilizer for anti-aggregation. We measured electrocatalytic oxygen reduction reaction (ORR) performance of the nanocubes supported on porous carbon by using cyclic voltammetry and linear sweep voltammetry under oxygen saturated 0.1M KOH solutions. The incorporation of manganese cations in Co3O4 nanocube has dramatically reduced the onset potential and increased the current density. When the value of the manganese ratio reaches down to 0.005, the spinel oxide nanocube catalyst exhibited the best performance in ORR. |
| 저자 |
이종현 |
| 소속 |
가톨릭대 |
| 키워드 |
spinel cobalt oxide; cobalt hydroxide; topochemical reaction; Fuel cell
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| E-Mail |
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