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A Multitude of Modifications Strategy of ZnFe₂O₄ Nanorod Photoanodes for Enhanced Photoelectrochemical Water Splitting Activity

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dc.contributor.authorKim, Ju Hun-
dc.contributor.authorJang, Youn Jeong-
dc.contributor.authorChoi, Sun Hee-
dc.contributor.authorLee, Byeong Jun-
dc.contributor.authorKim, Jeong Hun-
dc.contributor.authorPark, Yoon Bin-
dc.contributor.authorNam, Chang-Mo-
dc.contributor.authorKim, Hyun Gyu-
dc.contributor.authorLee, Jae Sung-
dc.date.accessioned2021-08-02T13:27:12Z-
dc.date.available2021-08-02T13:27:12Z-
dc.date.created2021-05-14-
dc.date.issued2018-07-
dc.identifier.issn2050-7488-
dc.identifier.urihttps://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16810-
dc.description.abstractNumerous modifications strategies are applied to spinel ZnFe2O4 nanorods with a band gap energy of approximate to 2.0 eV to enhance their activity as a photoanode for photoelectrochemical (PEC) water splitting. First, hybrid microwave annealing (HMA) imparts high crystallinity to ZnFe2O4 nanorods, while preserving the formed nanostructure and maintaining high electric conductivity of F:SnO2 (FTO) substrate. This is in contrast to conventional thermal annealing (CTA) at 800 degrees C that causes aggregation of ZnFe2O4 and degradation of FTO. Second, insertion of a TiO2 underlayer blocks charge recombination at the FTO/electrolyte interface and serves as a source of Ti doping. Third, hydrogen treatment yields oxygen vacancies that increase charge carrier density and cause surface passivation. Last, a NiFeOx co-catalyst promotes hole injection into the electrolyte to improve catalytic water oxidation activity. These synergistic modifications lead to enhanced photocurrent density from 0.025 mA cm(-2) at 1.23 V-RHE for pristine ZnFe2O4 nanorods prepared by CTA to 0.92 mA cm(-2) for a fully modified HMA photoanode: a 37-fold increase in photocurrent density. There is also a cathodic shift of the onset potential down to 0.62 V-RHE. The multiple modifications enhance bulk charge separation efficiencies from mere 2% to 30% and surface charge separation efficiency from 40% to 80%.-
dc.language영어-
dc.language.isoen-
dc.publisherRoyal Society of Chemistry-
dc.titleA Multitude of Modifications Strategy of ZnFe₂O₄ Nanorod Photoanodes for Enhanced Photoelectrochemical Water Splitting Activity-
dc.typeArticle-
dc.contributor.affiliatedAuthorJang, Youn Jeong-
dc.identifier.doi10.1039/C8TA02161A-
dc.identifier.scopusid2-s2.0-85049515385-
dc.identifier.wosid000437469300054-
dc.identifier.bibliographicCitationJournal of Materials Chemistry A, v.6, no.26, pp.12693 - 12700-
dc.relation.isPartOfJournal of Materials Chemistry A-
dc.citation.titleJournal of Materials Chemistry A-
dc.citation.volume6-
dc.citation.number26-
dc.citation.startPage12693-
dc.citation.endPage12700-
dc.type.rimsART-
dc.type.docType정기학술지(Article(Perspective Article포함))-
dc.description.journalClass1-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaChemistry-
dc.relation.journalResearchAreaEnergy & Fuels-
dc.relation.journalResearchAreaMaterials Science-
dc.relation.journalWebOfScienceCategoryChemistry, Physical-
dc.relation.journalWebOfScienceCategoryEnergy & Fuels-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.subject.keywordPlusTHIN-FILM-
dc.subject.keywordPlusOXYGEN VACANCY-
dc.subject.keywordPlusOXIDE-
dc.subject.keywordPlusHYDROGEN-
dc.subject.keywordPlusOXIDATION-
dc.subject.keywordPlusBULK-
dc.identifier.urlhttps://pubs.rsc.org/en/content/articlelanding/2018/TA/C8TA02161A-
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