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DC Field | Value | Language |
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dc.citation.startPage | 132623 | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 430 | - |
dc.contributor.author | Meena, Abhishek | - |
dc.contributor.author | Thangavel, Pandiarajan | - |
dc.contributor.author | Nissimagoudar, Arun S. | - |
dc.contributor.author | Singh, Aditya Narayan | - |
dc.contributor.author | Jana, Atanu | - |
dc.contributor.author | Jeong, Da Sol | - |
dc.contributor.author | Im, Hyunsik | - |
dc.contributor.author | Kim, Kwang S. | - |
dc.date.accessioned | 2023-12-21T14:37:22Z | - |
dc.date.available | 2023-12-21T14:37:22Z | - |
dc.date.created | 2023-03-02 | - |
dc.date.issued | 2022-02 | - |
dc.description.abstract | Large scale, cost-efficient, durable, and non-noble metal catalysts for overall water splitting in alkaline-anionexchange-membrane-water-electrolyzer (AAEMWE) are highly demanded for the clean hydrogen economy. Meanwhile, V- and Co-based bimetallic oxide materials were rarely reported for overall water splitting in AAEMWE. Herein, we demonstrate that the self-supported oxovanadate-doped cobalt carbonate (VCoCOx@NF) on nickel foam (NF) is a high-performance overall water-splitting catalyst in AAEMWE. The as-prepared VCoCOx@NF catalyst demonstrates high activity for both hydrogen and oxygen evolution reactions (HER and OER) in alkaline media, with a current density (j) of 10 mA cm-2 at overpotentials of 63 mV and 240 mV, respectively. Assembled as a conventional electrolyzer for overall water splitting, VCoCOx@NF as both anode and cathode in 1 M KOH operates at low cell voltages of 1.54 and 1.74 V at 10 and 100 mA cm-2, respectively, superior to the Ir/ C-Pt/C@NF electrolyzer (1.59 and 1.86 V, respectively). First principle calculations show that the remarkable HER and OER at the Co site are due to the doping of V species, which reduces the overpotential by shifting the delectron states of Co towards the Fermi-level. Besides, an AAEMWE cell fabricated with the VCoCOx@NF catalyst delivers j = 200 mA cm-2 at 2.01 V in deionized water, lower than the expensive commercial IrOx-Pt/C@Au/Ti electrolyzer (2.06 V). This finding provides the stage for large-scale hydrogen production by utilizing the V- and Co-based bimetallic oxide materials. | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.430, pp.132623 | - |
dc.identifier.doi | 10.1016/j.cej.2021.132623 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.scopusid | 2-s2.0-85116722258 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/62223 | - |
dc.identifier.wosid | 000724712700001 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Bifunctional oxovanadate doped cobalt carbonate for high-efficient overall water splitting in alkaline-anion-exchange-membrane water-electrolyzer | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Engineering, Chemical | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Oxygen evolution reaction | - |
dc.subject.keywordAuthor | Hydrogen evolution reaction | - |
dc.subject.keywordAuthor | Overall water splitting | - |
dc.subject.keywordAuthor | Water-electrolyzer | - |
dc.subject.keywordAuthor | Electrocatalysts | - |
dc.subject.keywordPlus | OXYGEN-EVOLUTION ELECTROCATALYSTS | - |
dc.subject.keywordPlus | HYDROGEN EVOLUTION | - |
dc.subject.keywordPlus | ENERGY-STORAGE | - |
dc.subject.keywordPlus | PH-UNIVERSAL | - |
dc.subject.keywordPlus | VANADIUM | - |
dc.subject.keywordPlus | NICKEL | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | V2O5 | - |
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