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Kwak, Sang Kyu
Kyu’s MolSim Lab @ UNIST
Research Interests
  • Molecular modeling and simulation, statistical thermodynamics, molecular physics

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Precisely-controlled, a few layers of iron titanate inverse opal structure for enhanced photoelectrochemical water splitting

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dc.contributor.author Zhang, Hemin ko
dc.contributor.author Park, Sung O. ko
dc.contributor.author Joo, Se Hun ko
dc.contributor.author Kim, Jin Hyun ko
dc.contributor.author Kwak, Sang Kyu ko
dc.contributor.author Lee, Jae Sung ko
dc.date.available 2019-07-31T06:18:24Z -
dc.date.created 2019-05-29 ko
dc.date.issued 2019-08 ko
dc.identifier.citation NANO ENERGY, v.62, pp.20 - 29 ko
dc.identifier.issn 2211-2855 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/27181 -
dc.description.abstract Iron titanate (Fe 2 TiO 5 ) is a promising photoanode material due to a narrow band gap, appropriate band edges, robustness and abundance. However, its performance is limited because of its low conductivity and short hole diffusion length. Precisely controlled, a few Fe 2 TiO 5 layers of inverse opal structure (IOS) is fabricated via a layer-by-layer self-assembly and then treated by hybrid microwave annealing to produce a highly crystalline, yet IOS morphology-preserved Fe 2 TiO 5 photoanode film for solar water splitting. The highly transparent Fe 2 TiO 5 IOS film shows a greatly enhanced visible light harvesting, higher density of catalytically more active crystal planes, and many single crystalline nanoplates grown on the IOS architecture, relative to a reference planar film prepared under similar conditions. As a result, the optimized ‘exactly’ three Fe 2 TiO 5 layers IOS electrode with a sacrificial gallium oxide underlayer and a ternary (Ni 2 CoFe)OOH co-catalyst records 2.08 mA cm −2 at 1.23 V RHE under 1 sun (100 mW cm −2 ) irradiation, which is the highest photocurrent density produced by Fe 2 TiO 5 photoanode up to date. ko
dc.language 영어 ko
dc.publisher Elsevier Ltd ko
dc.title Precisely-controlled, a few layers of iron titanate inverse opal structure for enhanced photoelectrochemical water splitting ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85065619898 ko
dc.identifier.wosid 000474636100003 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.nanoen.2019.05.025 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S2211285519304318?via%3Dihub ko
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