https://scholars.lib.ntu.edu.tw/handle/123456789/370430
標題: | Photocatalytic water splitting to produce hydrogen using multi-junction solar cell with different deposited thin films | 作者: | Huang, C.-W. Liao, C.-H. Wu, C.-H. Wu, J.C.S. JEFFREY CHI-SHENG WU |
關鍵字: | H-type reactor; Hydrogen; Multi-junction; Solar energy; Water splitting | 公開日期: | 2012 | 卷: | 107 | 起(迄)頁: | 322-328 | 來源出版物: | Solar Energy Materials and Solar Cells | 摘要: | Multi-junction solar cell (MJSC) was integrated into an H-type reactor system to carry out water-splitting reaction without external circuit and bias. In the H-type reactor, hydrogen and oxygen could be evolved separately. Different kinds of materials were deposited on the bottom cell to prevent corrosion. These materials include silver, platinum, and iron oxide layers which were prepared via an electron beam-induced deposition (EBID) method. Under visible-light irradiation, hydrogen production was achieved by using the MJSC; however, only a small amount of oxygen was evolved. The photogenerated holes may oxidize the photoelectrode instead of water, meaning that Ge subcell or the deposited thin film was oxidized during the photoreaction. The thin films ranked from highest hydrogen evolution to lowest are: Pt> bare Ge> Fe 3O 4> Ag. The photoelectrode deposited with metal thin film showed better activity due to its higher conductivity, except Ag. The poor performance of photoelectrode with silver thin film was due to the formation of silver oxide during photoreaction which may trap electrons, lowering the amount of electrons available to carry out water reduction. The chemical bias for H-type reactor system was eliminated by using sodium sulfate as the electrolyte. The ratio of evolved hydrogen to oxygen was near 2:1, suggesting that real water-splitting reaction can be achieved by using the MJSC incorporated H-type reactor system without chemical bias. © 2012 Elsevier B.V. All rights reserved. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84867573119&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/370430 |
DOI: | 10.1016/j.solmat.2012.07.003 | SDG/關鍵字: | Bottom cells; Electron beam-induced deposition; External circuits; H-type reactor; Hydrogen evolution; Iron oxide layers; Metal thin film; Multi junction solar cells; Multi-junction; Photocatalytic water splitting; Photoelectrode; Photogenerated holes; Photoreactions; Poor performance; Reactor systems; Silver thin films; Visible-light irradiation; Water reduction; Water splitting; Deposits; Electron beams; Germanium; Hydrogen production; Iron oxides; Nanostructured materials; Oxygen; Photoreactivity; Platinum; Silver; Silver oxides; Solar cells; Solar energy; Thin films; Vapor deposition; Hydrogen |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。