Available online 16 March 2022 Keywords: Defect WO3 QDs N-doped graphene Electrocatalyst Interfacial effect ORR
DC Field | Value | Language |
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dc.contributor.author | Chen, Kai | - |
dc.contributor.author | Wang, Wenmeng | - |
dc.contributor.author | Chen, Linfeng | - |
dc.contributor.author | Dao, Dung, V | - |
dc.contributor.author | Park, Jucheol | - |
dc.contributor.author | Rajendiran, Rajmohan | - |
dc.contributor.author | Lee, In-Hwan | - |
dc.contributor.author | Li, Oi L. | - |
dc.date.accessioned | 2022-08-12T11:40:18Z | - |
dc.date.available | 2022-08-12T11:40:18Z | - |
dc.date.created | 2022-08-12 | - |
dc.date.issued | 2022-07-05 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/142900 | - |
dc.description.abstract | Ultrafine quantum-dot-modified nitrogen-doped graphene has attracted board interest and has become frontier research in metal-air batteries and fuel cells. In this study, oxygen vacancy defect tungsten oxide quantum dots (Vo-WO3 QDs) are embedded in nitrogen-doped graphene (NG) to form abundant heterogeneous interfacial electrocatalysts (Vo-WO3 QDs/NG), which exhibits advanced electrocatalytic activity for oxygen reduction reaction (ORR) in an alkaline electrolyte. The optimized Vo-WO3 QDs/NG-5 (W content of 0.14 wt%) exhibits high onset potential (0.932 V vs. RHE) and decent half-wave potential (0.762 V vs. RHE) with high stability, which outperforms other reported tungsten metal oxide-based ORR electrocatalysts. The outstanding electrocatalytic performances of Vo-WO3 QDs/NG-5 are contributed by higher amount of oxygen vacancy and defects in Vo-WO3 QDs, as well as tunable interfacial electronic properties between the Vo-WO3 QDs and NG support. Furthermore, the density functional theory (DFT) is systematically conducted to determine the electronic properties and interface charge transmission for Vo-WO3 QDs/NG entity, providing important insight on the electrocatalysts in terms of band regulation and electron transport at the active interface between Vo-WO3 QDs and NG. Our finding paves an efficient pathway to design highly active hetero-structural and durable electrocatalysts for ORR applications based on defect-rich metal oxide QDs supported on nitrogen-doped graphene. (C) 2022 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | OXYGEN REDUCTION REACTION | - |
dc.subject | TUNGSTEN-OXIDE | - |
dc.subject | CATALYTIC-ACTIVITY | - |
dc.subject | SUPERCAPACITOR ELECTRODE | - |
dc.subject | GRAPHITIC NITROGEN | - |
dc.subject | FACILE SYNTHESIS | - |
dc.subject | CHARGE-TRANSFER | - |
dc.subject | ACTIVE-SITES | - |
dc.subject | CARBON | - |
dc.subject | NANOPARTICLES | - |
dc.title | Available online 16 March 2022 Keywords: Defect WO3 QDs N-doped graphene Electrocatalyst Interfacial effect ORR | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, In-Hwan | - |
dc.identifier.doi | 10.1016/j.jallcom.2022.164588 | - |
dc.identifier.scopusid | 2-s2.0-85126849672 | - |
dc.identifier.wosid | 000806373000002 | - |
dc.identifier.bibliographicCitation | JOURNAL OF ALLOYS AND COMPOUNDS, v.908 | - |
dc.relation.isPartOf | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.citation.title | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.citation.volume | 908 | - |
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.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | OXYGEN REDUCTION REACTION | - |
dc.subject.keywordPlus | TUNGSTEN-OXIDE | - |
dc.subject.keywordPlus | CATALYTIC-ACTIVITY | - |
dc.subject.keywordPlus | SUPERCAPACITOR ELECTRODE | - |
dc.subject.keywordPlus | GRAPHITIC NITROGEN | - |
dc.subject.keywordPlus | FACILE SYNTHESIS | - |
dc.subject.keywordPlus | CHARGE-TRANSFER | - |
dc.subject.keywordPlus | ACTIVE-SITES | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordAuthor | N-doped graphene | - |
dc.subject.keywordAuthor | Electrocatalyst | - |
dc.subject.keywordAuthor | Interfacial effect | - |
dc.subject.keywordAuthor | ORR | - |
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