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DC Field | Value | Language |
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dc.citation.number | 4463 | - |
dc.citation.title | ENERGY & FUELS | - |
dc.citation.volume | 4451 | - |
dc.contributor.author | Park, Seohyun | - |
dc.contributor.author | Jun, Jong Han | - |
dc.contributor.author | Park, Minjeong | - |
dc.contributor.author | Jeong, Jaehoon | - |
dc.contributor.author | Jo, Jeong-Hyang | - |
dc.contributor.author | Jeon, Sohee | - |
dc.contributor.author | Yang, Juchan | - |
dc.contributor.author | Choi, Sung Mook | - |
dc.contributor.author | Jo, Wook | - |
dc.contributor.author | Lee, Ji-Hoon | - |
dc.date.accessioned | 2024-03-13T14:05:11Z | - |
dc.date.available | 2024-03-13T14:05:11Z | - |
dc.date.created | 2024-03-11 | - |
dc.date.issued | 2024-03 | - |
dc.description.abstract | Anion-exchange-membrane water electrolyzers (AEMWEs) have gained considerable attention owing to their low cost and high energy efficiency, combining the advantages of alkaline water electrolyzers (AWEs) and proton-exchange membrane water electrolyzers (PEMWEs). Despite these merits, AEMWEs face challenges associated with the insufficient electrochemical activity of transition-metal-based electrocatalysts and their inferior long-term durability, particularly in electrodes for the oxygen evolution reaction (OER). To address these issues, hierarchically structured OER electrocatalysts comprising a Co4Fe3 core and N-doped graphitic carbon shell were synthesized in this study by pyrolyzing Co/Fe-Prussian blue analogues (PBAs)-based templates. The resulting electrocatalyst demonstrated exceptional OER activity and durability, attributed to the synergy among the abundant Co3+ species, the high electrochemically active surface area, a highly conductive bimetallic alloy core, and the oxygen-enriched functional groups and pyridinic N in the N-doped carbon shell. The Co4Fe3@N-doped graphitic carbon electrocatalyst exhibited a significantly lower overpotential (245 mV at 10 mA cm(-2)) and enhanced mass transport kinetics (Tafel slope of 62.9 mV dec(-1)) compared to those of a commercialized precious metal-based IrO2 catalyst (328 mV at 10 mA cm(-2) and 95.3 mV dec(-1), respectively). In the AEMWE full cells, the electrolyzer based on Co4Fe3@N-doped graphitic carbon delivered a 139% higher energy efficiency and a 70 times lower performance degradation rate compared with those of the IrO2-based counterpart. The proposed PBA-based electrocatalyst can be readily synthesized using a simple synthesis process and nonprecious-metal-based materials, presenting a promising pathway for the cost-effective commercialization of AEMWEs. | - |
dc.identifier.bibliographicCitation | ENERGY & FUELS, v.4451, no.4463 | - |
dc.identifier.doi | 10.1021/acs.energyfuels.3c04077 | - |
dc.identifier.issn | 0887-0624 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/81603 | - |
dc.identifier.wosid | 001166450900001 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Hierarchically Designed Co4Fe3@N-Doped Graphitic Carbon as an Electrocatalyst for Oxygen Evolution in Anion-Exchange-Membrane Water Electrolysis | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels; Engineering, Chemical | - |
dc.relation.journalResearchArea | Energy & Fuels; Engineering | - |
dc.type.docType | Article; Early Access | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | IRON | - |
dc.subject.keywordPlus | HEXACYANOFERRATE | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | GRAPHENE | - |
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