Electrochemically Identified Ultrathin Water-Oxidation Catalyst in Neutral pH Solution Containing Ni2+ and Its Combination with Photoelectrode
DC Field | Value | Language |
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dc.contributor.author | Cho, Sung Ki | - |
dc.contributor.author | Chang, Jinho | - |
dc.date.accessioned | 2024-02-27T13:00:36Z | - |
dc.date.available | 2024-02-27T13:00:36Z | - |
dc.date.issued | 2017-02 | - |
dc.identifier.issn | 2470-1343 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26987 | - |
dc.description.abstract | Water oxidation electrocatalyzed by Ni2+ under neutral conditions was investigated using various electrochemical analyses. The addition of Ni2+ in a phosphatebuffered solution catalyzed the oxidation of water, as confirmed by the detection of oxygen generation via scanning electrochemical microscopy. A combination of cyclic voltammetry, coulometric titration, and electrochemical quartz microbalance measurements identified the catalysis as heterogeneous and the catalyst as a Ni-based ultrathin (< 4 nm) layer ("Ni-Pi"). Analysis of the potential-and pHdependency of the titrated amount of charge revealed that the catalyst was deposited only under anodic polarization conditions and was removed under unpolarized conditions; the catalyst may be Ni( III) oxide, and its formation and oxidation appeared to be chemically irreversible. The diffusion-limited nature of water oxidation catalyzed by Ni2+ was closely related to the phosphate ions involved in the catalyst formation and the accompanying catalysis. Although the catalytic performance of Ni2+ alone was not remarkable, it exhibited a synergetic effect with BiVO4 for photoelectrochemical water oxidation, which can compete with Co-Pidecorated BiVO4. | - |
dc.format.extent | 11 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Electrochemically Identified Ultrathin Water-Oxidation Catalyst in Neutral pH Solution Containing Ni2+ and Its Combination with Photoelectrode | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1021/acsomega.6b00448 | - |
dc.identifier.wosid | 000395863300008 | - |
dc.identifier.bibliographicCitation | ACS OMEGA, v.2, no.2, pp 432 - 442 | - |
dc.citation.title | ACS OMEGA | - |
dc.citation.volume | 2 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 432 | - |
dc.citation.endPage | 442 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | esci | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.subject.keywordPlus | OXYGEN-EVOLVING CATALYST | - |
dc.subject.keywordPlus | THIN-FILMS | - |
dc.subject.keywordPlus | IN-SITU | - |
dc.subject.keywordPlus | ARTIFICIAL PHOTOSYNTHESIS | - |
dc.subject.keywordPlus | HETEROGENEOUS CATALYSIS | - |
dc.subject.keywordPlus | NICKEL HYDROXIDES | - |
dc.subject.keywordPlus | COBALT | - |
dc.subject.keywordPlus | EVOLUTION | - |
dc.subject.keywordPlus | ELECTROCATALYSTS | - |
dc.subject.keywordPlus | FE | - |
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