Charge Transfer Kinetics of Photo-Electrochemical Hydrogen Evolution Improved by Nonstoichiometric Ni-rich NiOx-Coated Si Photocathode in Alkaline Electrolyte
DC Field | Value | Language |
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dc.contributor.author | Jung, Jin-Young | - |
dc.contributor.author | Yu, Jin-Young | - |
dc.contributor.author | Yoon, Sanghwa | - |
dc.contributor.author | Yoo, Bongyoung | - |
dc.contributor.author | Lee, Jung-Ho | - |
dc.date.accessioned | 2021-06-22T12:21:36Z | - |
dc.date.available | 2021-06-22T12:21:36Z | - |
dc.date.created | 2021-01-21 | - |
dc.date.issued | 2018-02 | - |
dc.identifier.issn | 2366-7486 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/6792 | - |
dc.description.abstract | The integration of electrocatalyst (EC) with light-absorbing semiconductor photoelectrode is regarded as a representative framework for photoelectrochemical (PEC) devices. When considering the charge transfer pathways, PEC performance is governed by the charge kinetics at the EC/electrolyte and the semiconductor/EC interfaces. Here, systematic investigations are reported, made on the overall kinetics of the PEC hydrogen evolution reaction (HER) in an alkaline electrolyte. A non-stoichiometric (Ni-rich) NiOx (x < 1) EC is deposited on a Si photocathode passivated with a SiOx layer. A few distinctive features of the Ni-rich NiOx film are identified in contrast with the conventional O-rich NiOy (y >= 1) which could lower the series resistance along the charge transfer pathways. The Ni-rich NiOx is found to possess both NiO and Ni-Ni (by oxygen-vacancy) bonds, which act as suitable catalytic sites for dissociating water molecules and recombining two hydrogen atoms, respectively. In addition, the Ni-rich NiOx reveals both n-type and metallic conduction behavior, a feature that may contribute to lowering bulk resistance as well as tunneling resistance through SiOx layer. As a result, this noble metal-free EC-integrated Si photocathode achieves the highest potential of 0.41 V vs. reversible hydrogen electrode to produce a photocurrent density of 10 mA cm(2). | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.title | Charge Transfer Kinetics of Photo-Electrochemical Hydrogen Evolution Improved by Nonstoichiometric Ni-rich NiOx-Coated Si Photocathode in Alkaline Electrolyte | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Yoo, Bongyoung | - |
dc.contributor.affiliatedAuthor | Lee, Jung-Ho | - |
dc.identifier.doi | 10.1002/adsu.201700138 | - |
dc.identifier.scopusid | 2-s2.0-85092200918 | - |
dc.identifier.wosid | 000424712800006 | - |
dc.identifier.bibliographicCitation | Advanced Sustainable Systems, v.2, no.2, pp.1 - 6 | - |
dc.relation.isPartOf | Advanced Sustainable Systems | - |
dc.citation.title | Advanced Sustainable Systems | - |
dc.citation.volume | 2 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 6 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Green & Sustainable Science & Technology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | MOLYBDENUM SULFIDE CATALYST | - |
dc.subject.keywordPlus | SILICON PHOTOCATHODE | - |
dc.subject.keywordPlus | PROTECTIVE LAYER | - |
dc.subject.keywordPlus | WATER-OXIDATION | - |
dc.subject.keywordPlus | H-2 EVOLUTION | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | ELECTROCATALYSTS | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | DISULFIDE | - |
dc.subject.keywordAuthor | electrocatalysts | - |
dc.subject.keywordAuthor | hydrogen evolution reaction | - |
dc.subject.keywordAuthor | NiOx | - |
dc.subject.keywordAuthor | photo-electrochemical cells | - |
dc.subject.keywordAuthor | Si photocathode | - |
dc.identifier.url | https://onlinelibrary.wiley.com/doi/10.1002/adsu.201700138 | - |
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