| 학회 | 한국재료학회 |
| 학술대회 | 2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 | 27권 2호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Preparation of double-side Cu/CuO nanostructure photoelectrodes for photoelectrochemical water splitting |
| 초록 | To solve the environmental pollution excreted from the fossil fuels and their continuous depletion, it is necessary to develop new alternative energy sources. Among them, production of hydrogen fuel as an eco-friendly energy source can be an excellent strategy, utilizing the abundant solar power and water to overcome the current energy crisis. To achieve this, variety of water splitting techniques have been proposed to produce H2, using TiO2, WO3, Fe2O3, and CuO photoelectrodes. Specifically, CuO is one of the most attracted material for photoelectrochemical water splitting, owing to the direct band gap of 1.3-1.7eV with a proven theoretical solar to fuel conversion efficiency of 42% and photocurrent density of –35 mA/cm2. In this the present work, a facile solution oxidation method is developed to prepare double side and flexible Cu/CuO nanostructure and utilized as a photoelectrode for water splitting. The surface morphology of double side Cu/CuO nanostructure have been altered by using a post-annealing technique. The photoelectrochemical measurement was performed to validate the importance of double side Cu/CuO photoelectrode and compared with a conventional one side Cu/CuO photoelectrode. The efficiency improvement of 45% was observed with double side Cu/CuO photoelectrode compared to one side photoelectrode. In addition, the influence of post annealing on the Cu/CuO nanostructure photoelectrodes is investigated and compared with as-prepared Cu/CuO photoelectrode. In fact, a maximum 30% improvement in the applied bias photon-to-current efficiency is obtained for the post annealed Cu/CuO nanostructure photoelectrode (2.3%) compared to as-prepared Cu/CuO nanostructure photoelectrode (1.8%). It was noticed that the post annealing facilitates to alter the grain size to simplify the space charge region for efficient charge extraction and stability. Altogether, it is confirmed that the post annealing supports to exhibit a superior photoelectrochemical performance, compared to conventional one side photoelectrode. |
| 저자 | 박재홍, 손호기, 이인환 |
| 소속 | 고려대 |
| 키워드 | watersplitting; photoelectrode; double-side photoelectrode |
