| 학회 | 한국화학공학회 |
| 학술대회 | 2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 | 16권 2호, p.1831 |
| 발표분야 | 에너지 |
| 제목 | Doping Effect of M-doped BiVO4 (M=Mo,W) for Water Oxidation under Visible Light |
| 초록 | Water oxidation to obtain oxygen and proton is one of the key processes for artificial photosynthesis that produce liquid fuel like methanol from carbon dioxide and water. Bismuth vanadate (BiVO4) is one of the best photocatalysts for it. In this work, photoelectrochemical properties and photoactivity for oxygen evolution of pure monoclinic M-doped BiVO4 (M=Mo, W) powders were investigated to find out the origin of their high performance. Morphology, structure and phase, and band gap energy are measured by scanning electron microscope, X-ray diffraction spectroscopy, and UV-vis diffuse reflectance spectroscopy. Photoelectrochemical measurements which are I-V curve and electrochemical impedance spectroscopy were performed with the fabricated photoanodes on FTO glass, and they showed increased photocurrent density and dramatically decreased impedance, which means enhanced conductivity. The origin of enhanced photoactivity behavior is further investigated using first principle electronic structure calculations, and the results fully accord with experimentally observed photoactivity results. |
| 저자 | 강현준, K.P.S.Parmar, 장점석, 홍석준, 이재성 |
| 소속 | 포항공과대 |
| 키워드 | BiVO4; doping; water oxidation |
| 원문파일 | 초록 보기 |
