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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Self-motivated, thermally oxidized hematite nanoflake photoanodes: Effects of pre-polishing and ZrO2 passivation layer

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dc.contributor.author Dhandole, Love Kumar ko
dc.contributor.author Lee, Hyun Hwi ko
dc.contributor.author Cha, Weon-Sik ko
dc.contributor.author Jang, Jum Suk ko
dc.contributor.author Lee, Jae Sung ko
dc.date.available 2021-10-14T08:22:12Z -
dc.date.created 2021-08-31 ko
dc.date.issued 2022-02 ko
dc.identifier.citation JOURNAL OF ENERGY CHEMISTRY, v.65, pp.415 - 423 ko
dc.identifier.issn 2095-4956 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/54103 -
dc.description.abstract High-temperature thermal oxidation of an Fe foil produces a high-quality, crystalline hematite nanoflake suitable as a photoanode for the photoelectrochemical (PEC) water oxidation. Physical pre-polishing of the foil surface has a profound effect in the formation of a vertically-aligned nanoflakes of hematite phase with extended (110) planes by removing the loosely-bonded oxide layer. When the surface of the photoanode is modified with a ZrO2 passivation layer and a cobalt phosphate co-catalyst, the charge recombination at the photoanode-electrolyte interface is greatly suppressed to improve its overall PEC activity. As a result, the photocurrent density at 1.10 VRHE under 1 sun condition is enhanced from 0.22 mA cm(-2) for an unmodified photoanode to 0.59 mA cm(-2) for the fully modified photoanode, and the photocurrent onset potential is shifted cathodically by 400 mV. Moreover, the photoanode demonstrates outstanding stability by showing steady production of H-2 and O-2 gases in the stoichiometric ratio of 2:1 in a continuous PEC operation for 10 h. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved. ko
dc.language 영어 ko
dc.publisher ELSEVIER ko
dc.title Self-motivated, thermally oxidized hematite nanoflake photoanodes: Effects of pre-polishing and ZrO2 passivation layer ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85108267706 ko
dc.identifier.wosid 000701767100003 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.jechem.2021.06.009 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S2095495621003508?via%3Dihub ko
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