| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.564 |
| 발표분야 |
에너지 환경(Energy and Environment) |
| 제목 |
Boosting Charge Separation in WO3 with Balanced Oxygen Vacancy for Efficient Hydrogen Production |
| 초록 |
Suppressing charge recombination at the electrode/electrolyte surface is considered a crucial strategy to improve photoelectrochemical (PEC) water oxidation. On the basis of great successful on passivation layer, we put forward an innovative design on targeting possible recombination center of a disordered overlayer to further improve the effectiveness of passivation layer. A 3 nm thick disorder overlayer in-situ formed on WO3 photoanode, which contains excessive oxygen vacancies, was repaired by oxygen-rich carbon nitride quantum dots (CNQDs). In such a way, the surficial defect repair for the disordered passivation layer dramatically improve the PEC performance, including a 1.5-fold photocurrent density and a 100 mV cathodic onset potential shift to disorder overlayer. Moreover, investigations on charge transfer and transport efficiencies of the DL-WO3/CNQDs photoanode clearly demonstrate the dominated role of charge transfer, suggesting that the surficial defect repair mainly accounts for charge recombination at the electrode/electrolyte interface. |
| 저자 |
Jin Bingjun1, Ping Li2, Jie Jin2, 박종혁2
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| 소속 |
1Yonsei Univ., 2연세대 |
| 키워드 |
에너지 환경 |
| E-Mail |
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| 원문파일 |
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