Nanowire/nanotube array tandem cells for overall solar neutral water splitting
| Autor: | Chin-Hung Liu, Sungho Jin, Namseok Park, Alireza Kargar, Shadi A. Dayeh, Deli Wang, Jirapon Khamwannah |
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| Rok vydání: | 2016 |
| Předmět: |
Nanotube
Materials science Fabrication Annealing (metallurgy) Nanowire Nanotechnology Neutral pH water 02 engineering and technology Core/shell/hierarchical nanowires 010402 general chemistry 01 natural sciences Photocathode Macromolecular and Materials Chemistry Overall solar water splitting Affordable and Clean Energy General Materials Science Electrical and Electronic Engineering Photoelectrochemical (PEC) tandem cell Tandem Renewable Energy Sustainability and the Environment business.industry Gas evolution reaction Materials Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences Core/shell nanotubes Optoelectronics Water splitting 0210 nano-technology business |
| Zdroj: | Kargar, A; Khamwannah, J; Liu, CH; Park, N; Wang, D; Dayeh, SA; et al.(2016). Nanowire/nanotube array tandem cells for overall solar neutral water splitting. Nano Energy, 19, 289-296. doi: 10.1016/j.nanoen.2015.11.019. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/2mm8f317 |
| ISSN: | 2211-2855 |
| DOI: | 10.1016/j.nanoen.2015.11.019 |
| Popis: | © 2015. In this study, we report the fabrication and characterization of a novel PEC tandem cell, consisting of p-Si/TiO2/Fe2O3core/shell/hierarchical nanowire (csh-NW) array photocathode and TiO2/TiO2core/shell nanotube (cs-NT) array photoanode, for overall solar water splitting in a neutral pH water. The p-Si/n-TiO2/n-Fe2O3csh-NWs, made mainly by solution-processed methods, offer significantly improved performance in the neutral pH water with a low (positive) onset potential and photoactivity at zero bias, due to the increased reaction surface area, effective energy band alignment among p-Si, n-TiO2and n-Fe2O3enhancing the charge separation, improved optical absorption, and enhanced gas evolution. Nitrogen modification (annealing under N2) is used to further enhance the csh-NWs photocathodic performance. The PEC tandem cell is then able to handle overall solar water splitting in the neutral pH water with a solar-to-hydrogen (STH) efficiency of ~0.18%. The achieved results demonstrate initial steps toward the realization of full PEC devices using earth-abundant materials for solar hydrogen generation suggesting competitive performance when solar matched photoanode core material and co-catalysts are used. |
| Databáze: | OpenAIRE |
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