Electrochemically activated Ni@Ni(OH)2 heterostructure as efficient hydrogen evolution reaction electrocatalyst for anion exchange membrane water electrolysis
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Guo, W. | - |
dc.contributor.author | Kim, J. | - |
dc.contributor.author | Kim, H. | - |
dc.contributor.author | Hong, S. | - |
dc.contributor.author | Kim, S.Y. | - |
dc.contributor.author | Ahn, S.H. | - |
dc.date.accessioned | 2022-08-27T05:40:16Z | - |
dc.date.available | 2022-08-27T05:40:16Z | - |
dc.date.created | 2022-08-25 | - |
dc.date.issued | 2022-06 | - |
dc.identifier.issn | 2468-5194 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/143557 | - |
dc.description.abstract | Efficient and cost-effective catalysts are vital for sustainable hydrogen production via water electrolysis. In this study, we propose a facile method of fabricating a Ni@Ni(OH)2 heterostructure catalyst on a Ti paper substrate by combining electrodeposition and subsequent electrochemical activation. Detailed characterization and analysis revealed the formation of Ni (oxy)hydroxides. Ni@Ni(OH)2 underwent surface reconstruction, resulting in the formation of abundant heterojunctions and electron modulation during electrochemical activation, which substantially increased the exposed surface area facilitating the adsorption of intermediates during the hydrogen evolution reaction (HER). Thus, the resulting activated Ni@Ni(OH)2/Ti electrode exhibited significantly improved HER activity in the half-cell test, reaching a current density of −10 mA/cm2 at an overpotential of 58 mV with a Tafel slope of 83 mV/dec. When applied to anion exchange membrane water electrolysis, a single cell comprising an Ni@Ni(OH)2/Ti cathode and commercial IrO2/CP anode exhibited a maximum current density of 1.00 A/cm2 at a potential of 2.0 Vcell, demonstrating superior performance to commercial Pt/C electrodes in the high-current-density region above 2.0 A/cm2. © 2022 Elsevier Ltd | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | Elsevier Ltd | - |
dc.title | Electrochemically activated Ni@Ni(OH)2 heterostructure as efficient hydrogen evolution reaction electrocatalyst for anion exchange membrane water electrolysis | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, S.Y. | - |
dc.identifier.doi | 10.1016/j.mtchem.2022.100994 | - |
dc.identifier.scopusid | 2-s2.0-85132330328 | - |
dc.identifier.wosid | 000838084700009 | - |
dc.identifier.bibliographicCitation | Materials Today Chemistry, v.24 | - |
dc.relation.isPartOf | Materials Today Chemistry | - |
dc.citation.title | Materials Today Chemistry | - |
dc.citation.volume | 24 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | PHOSPHIDE | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordPlus | ENERGY | - |
dc.subject.keywordAuthor | Anion exchange membrane water electrolyzer | - |
dc.subject.keywordAuthor | Electrochemical activation | - |
dc.subject.keywordAuthor | Electrodeposition | - |
dc.subject.keywordAuthor | Heterostructure catalyst | - |
dc.subject.keywordAuthor | Hydrogen production | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.