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DC Field | Value | Language |
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dc.citation.endPage | 12700 | - |
dc.citation.number | 26 | - |
dc.citation.startPage | 12693 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.volume | 6 | - |
dc.contributor.author | Kim, Ju Hun | - |
dc.contributor.author | Jang, Youn Jeong | - |
dc.contributor.author | Choi, Sun Hee | - |
dc.contributor.author | Lee, Byeong Jun | - |
dc.contributor.author | Kim, Jeong Hun | - |
dc.contributor.author | Park, Yoon Bin | - |
dc.contributor.author | Nam, Chang-Mo | - |
dc.contributor.author | Kim, Hyun Gyu | - |
dc.contributor.author | Lee, Jae Sung | - |
dc.date.accessioned | 2023-12-21T20:37:43Z | - |
dc.date.available | 2023-12-21T20:37:43Z | - |
dc.date.created | 2018-07-27 | - |
dc.date.issued | 2018-07 | - |
dc.description.abstract | Numerous 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.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.26, pp.12693 - 12700 | - |
dc.identifier.doi | 10.1039/c8ta02161a | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.scopusid | 2-s2.0-85049515385 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/24457 | - |
dc.identifier.url | http://pubs.rsc.org/en/Content/ArticleLanding/2018/TA/C8TA02161A | - |
dc.identifier.wosid | 000437469300054 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | A multitude of modifications strategy of ZnFe2O4 nanorod photoanodes for enhanced photoelectrochemical water splitting activity | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Energy & Fuels; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | THIN-FILM | - |
dc.subject.keywordPlus | HEMATITE PHOTOANODES | - |
dc.subject.keywordPlus | OXYGEN VACANCY | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | UNDERLAYER | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | ARRAYS | - |
dc.subject.keywordPlus | BULK | - |
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