Highly Efficient Photoelectrochemical Hydrogen Generation Using Hierarchical ZnO/WOx Nanowires Cosensitized with CdSe/CdS
Citations Over TimeTop 10% of 2011 papers
Abstract
photoelectrochemical device with a novel hierarchical heterostructure coupled with narrow bandgap semiconductors is demonstrated for efficient hydrogen generation via water splitting. The heterostructures consist of ZnO nanowire branches grown on WOx nanowhisker stems, which offer a large surface area and efficient charge transport path. The assembly of CdSe/CdS narrow bandgap cosensitizers on hierarchical ZnO/WOx nanostructures is shown to enhance light harvesting in the visible light region. The cosensitized ZnO/WOx heterostructures demonstrate efficient light absorption up to a wavelength of 800 nm as well as enhanced photoelectrochemical properties when used as photoanodes. Furthermore, CdSe/CdS cosensitized ZnO/WOx has a type II cascade band structure, resulting in efficient charge transport, which was con firmed by open circuit voltage decay measurements. Our photoelectrochemical system produced a high photocurrent density of 11 mA/cm(2) at -0.5 V (vs SCE) under 1.5 AM irradiation for hydrogen generation.
Related Papers
- → Fabrication of an Efficient BaTaO2N Photoanode Harvesting a Wide Range of Visible Light for Water Splitting(2013)224 cited
- → Photoelectrochemical Properties and Behavior of α-SnWO4 Photoanodes Synthesized by Hydrothermal Conversion of WO3 Films(2016)49 cited
- → High performance and toxicity assessment of Ta3N5 nanotubes for photoelectrochemical water splitting(2019)9 cited
- → Semiconductive properties and photoelectrochemistry of an iron oxide electrode—VII. Photoresponse observed in initial pitting period of iron passive film in acidic medium(1989)6 cited
- → Reply to Comment on “Commercially Available WO3 Nanopowders for Photoelectrochemical Water Splitting: Photocurrent versus Oxygen Evolution”(2017)