Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7728211 | Journal of Power Sources | 2016 | 7 Pages |
Abstract
CdS/CdWO4/WO3 heterojunction films on fluorine-doped tin oxide (FTO) substrates are for the first time prepared as an efficient photoanode for photoelectrochemical (PEC) hydrogen generation by an in situ conversion process. The samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet visible spectrometry (UV-vis) and X-ray photoelectron spectroscopy (XPS). The CdS hollow spheres (â¼80Â nm) sensitized WO3 plate film with a CdWO4 buffer-layer exhibits increased visible light absorption and a significantly improved photoelectrochemical performance. The photocurrent density at 0Â V (vs. Ag/AgCl) of the CdS/CdWO4/WO3 anode is â¼3 times higher than that of the CdWO4/WO3 anode, and â¼9 times higher than that of pure WO3 under illumination. The highest incident-photon-to-current-efficiency (IPCE) value increased from 16% to 63% when the ternary heterojunction was formed. This study demonstrates that the synthesis of ternary composite photocatalysts by the in situ conversion process may be a promising approach to achieve high photoelectric conversion efficiency.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Faqi Zhan, Jie Li, Wenzhang Li, Yahui Yang, Wenhua Liu, Yaomin Li,