| 학회 | 한국화학공학회 |
| 학술대회 | 2016년 가을 (10/19 ~ 10/21, 대전컨벤션센터) |
| 권호 | 22권 2호, p.2230 |
| 발표분야 | 재료 |
| 제목 | Heterostructuring of Delafossite Photocathodes with Cu2O for Efficient CO2 Conversion |
| 초록 | Because of the global energy and environmental crisis caused by fossil fuels, interest in clean and renewable energy sources is increasing. Lately, conversion of CO2 into fuel has received much of attraction to solve problems at a time. Especially, photo-electrochemical system could be the most promising candidate since it costs the least of electrical energy to convert CO2 into fuel with aid of sunlight. Herein, CuCrO2(CCO) delafossite material has been studied as a CO2 reduction photocathode. It was observed that the photoactivity of CCO was not that good (Imax=0.2 mA/cm2) due to their large bandgap(Eg=3.2 eV). Fortunately, it was revealed from impedance spectroscopy that CCO has high majority carrier density and favorable band position for the formation of type-II heterojunction between Cu2O(Eg=2.0 eV). Based on the analyses, CCO/Cu2O heterostructure was investigated. The heterostructure photocathodes showed enhanced photocurrent density as much as 9 times while suffered from severe photocorrosion of Cu2O. Therefore, passivation layer treatment has been under investigation to enhnace the poor stabiity. |
| 저자 | 이석원, 이도창 |
| 소속 | KAIST |
| 키워드 | 화공나노소재 |
| 원문파일 | 초록 보기 |
