| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 |
25권 2호, p.1895 |
| 발표분야 |
재료 (Materials) |
| 제목 |
Sulfur tolerant catalyst fabricated with in situ exsolved CoNi alloy nanoparticles socketed on Ruddlesden-Popper support for efficient CO2 electrolysis to CO |
| 초록 |
We have developed a new and efficient sulfur-tolerant catalyst for use in SOEC cathode fabricated with in situ exsolved and socketed CoNi nanoparticles on the Ruddlesden-Popper (R.P.) support of La1.2Sr0.8Co0.4Mn0.6O4, and its catalytic activity for CO2 electrolysis to CO was evaluated under a CO2 gas stream that contains H2S species. This catalyst was prepared by in situ annealing of perovskite-derivatives in a 20% H2/N2 gas at 800 °C, which exhibited a good reversibility of structural transition during redox cycles. A high current density of 703 mA/cm2 was achieved at 1.3 V and 850 °C with a Faraday efficiency of 97.8%. In situ grown CoNi nanoparticles and high oxygen vacancy contents in the R.P. support should be responsible for its high catalytic activity and efficiency. Importantly, no sign of degradation is indicated as observed by galvanostatic tests over a period of 90 h operation in an H2S-contained CO2 gas condition. This Ruddlesden-Popper material with in situ exsolved CoNi nanoparticles should a promising cathode for practical application to H2S-contained CO2 gas conditions. |
| 저자 |
박성민, 김윤곤, 노유성, 한현수, 윤원근, 최준일, 김원배
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| 소속 |
POSTECH |
| 키워드 |
재료 |
| E-Mail |
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| 원문파일 |
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