NiOx nanoparticles as active water splitting catalysts for the improved photostability of a n-GaN photoanode
| Autor: | Jinn-Kong Sheu, Yu Tsun Yao, Sakthivel Kogularasu, Huang Kai Wang, Po Hsun Liao, Ming-Lun Lee |
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| Rok vydání: | 2020 |
| Předmět: |
Photocurrent
Materials science Working electrode Renewable Energy Sustainability and the Environment Conformal coating Energy conversion efficiency Nanoparticle 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Water splitting 0210 nano-technology Hydrogen production |
| Zdroj: | Solar Energy Materials and Solar Cells. 216:110723 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2020.110723 |
| Popis: | In this article, we propose a scheme using the conformal coating of p-NiOx nanoparticles on the n-GaN photoanode to prevent the photoelectrodes from corrosion and thereby enhance conversion efficiency. Furthermore, the various weight ratios of NiOx (1:5 and 3:2) are explored to optimize the study. NiOx nanoparticles avoid corrosion on the n-GaN surface, decrease the solar water-splitting reaction overpotential, and enhance the photocurrent density at a working electrode applied bias of 1 V in the two-electrode system. Finally, in the stability test, the hydrogen evolution rate of NiOx (3:2) is more effective than that of pristine n-GaN even after 5 h. These results indicate that NiOx nanoparticle-decorated n-GaN gains higher photostability and hydrogen production performance in PEC cells. |
| Databáze: | OpenAIRE |
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