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DC Field | Value | Language |
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dc.citation.endPage | 11939 | - |
dc.citation.number | 12 | - |
dc.citation.startPage | 11932 | - |
dc.citation.title | ACS CATALYSIS | - |
dc.citation.volume | 8 | - |
dc.contributor.author | Ahn, Hyo-Jin | - |
dc.contributor.author | Yoon, Ki-Yong | - |
dc.contributor.author | Kwak, Myung-Jun | - |
dc.contributor.author | Park, Juhyung | - |
dc.contributor.author | Jang, Ji-Hyun | - |
dc.date.accessioned | 2023-12-21T19:47:35Z | - |
dc.date.available | 2023-12-21T19:47:35Z | - |
dc.date.created | 2019-01-07 | - |
dc.date.issued | 2018-12 | - |
dc.description.abstract | We report that metal ions (M: Sn4+ and Ti4+) and boron-codoped hematite photoanodes with an n-n+ homojunction showed significantly increased photoelectrochemical (PEC) water splitting activity with greatly reduced surface recombination. The secondary B-doping of broadly used M-doped hematite photoanodes not only suppresses the number of M+ ions, which inevitably cause electron-hole pair (EHP) recombination, but also generates an internal electric field for easy hole extraction. Taking advantage of these effects, the maximum length (500-600 nm) of hematite, which has the reported highest PEC performance, was increased to up to 900 nm in M:B-Fe2O, which in turn increased the active area of the photoanode. The M:B-Fe2O3 with a film thickness of 900 nm and a diameter of 122 nm converted the incident photons to EHPs with substantially reduced recombination and exhibited a photocurrent density of 1.92 mA/cm2 at 1.23 VRHE. After loading inexpensive oxygen evolution reaction catalysts (FeOOH) on the surface of M:B-Fe2O3, the photocurrent density of FeOOH/M:B-Fe2O3 reached 2.35 mA/cm2 at 1.23 VRHE. The cost-effective strategy of B-doping into M-doped hematite provides a straightforward way to address the M-doping-related negative effects, such as a high electron-hole recombination rate on the surface of hematite, and thus the critical length limitation of an ideal hematite photoanode, to potentially improve the performance of PEC devices. | - |
dc.identifier.bibliographicCitation | ACS CATALYSIS, v.8, no.12, pp.11932 - 11939 | - |
dc.identifier.doi | 10.1021/acscatal.8b03184 | - |
dc.identifier.issn | 2155-5435 | - |
dc.identifier.scopusid | 2-s2.0-85057877144 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/25613 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acscatal.8b03184 | - |
dc.identifier.wosid | 000453491100096 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Boron Doping of Metal-Doped Hematite for Reduced Surface Recombination in Water Splitting | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | easy hole extraction | - |
dc.subject.keywordAuthor | heterodoping | - |
dc.subject.keywordAuthor | long hematite nanorods | - |
dc.subject.keywordAuthor | n-n+ junction | - |
dc.subject.keywordAuthor | photoelectrochemical water splitting | - |
dc.subject.keywordAuthor | recombination | - |
dc.subject.keywordPlus | OXYGEN EVOLUTION | - |
dc.subject.keywordPlus | PHOTOANODES | - |
dc.subject.keywordPlus | TI | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | FILMS | - |
dc.subject.keywordPlus | PHOTOOXIDATION | - |
dc.subject.keywordPlus | ENHANCEMENT | - |
dc.subject.keywordPlus | COCATALYST | - |
dc.subject.keywordPlus | CIRCUIT | - |
dc.subject.keywordPlus | STATE | - |
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