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- Jang, Ji-Hyun
- Structures & Sustainable Energy Lab.
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A Titanium-Doped SiOx Passivation Layer for Greatly Enhanced Performance of a Hematite-Based Photoelectrochemical System
- Author(s)
- Ahn, Hyo-Jin, Yoon, Ki-Young, Kwak, Myung-Jun, Jang, Ji-Hyun
- Issued Date
- 2016-08
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.55, no.34, pp.9922 - 9926
- Abstract
- This study introduces an insitu fabrication of nanoporous hematite with a Ti-doped SiOx passivation layer for a high-performance water-splitting system. The nanoporous hematite with a Ti-doped SiOx layer (Ti-(SiOx/np-Fe2O3)) has a photocurrent density of 2.44mAcm-2 at 1.23VRHE and 3.70mAcm-2 at 1.50VRHE. When a cobalt phosphate co-catalyst was applied to Ti-(SiOx/np-Fe2O3), the photocurrent density reached 3.19mAcm-2 at 1.23VRHE with stability, which shows great potential of the use of the Ti-doped SiOx layer with a synergistic effect of decreased charge recombination, the increased number of active sites, and the reduced hole-diffusion pathway from the hematite to the electrolyte.
- Publisher
- WILEY-V C H VERLAG GMBH
- ISSN
- 1433-7851
- Keyword (Author)
- conductive SiOx layers, hematite, nanoporous structures, passivation layers, photoelectrochemical cells
- Keyword
- HYDROGEN GENERATION, THIN-FILMS, WATER, NANOSTRUCTURES, PHOTOANODES, ELECTRODES, NANOTUBES, GRAPHENE, ARRAY, TI
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