DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yi, Seung Yeop | ko |
dc.contributor.author | Choi, Eunho | ko |
dc.contributor.author | Jang, Ho Yeon | ko |
dc.contributor.author | Lee, Seonggyu | ko |
dc.contributor.author | Park, Jinkyu | ko |
dc.contributor.author | Choi, Daeeun | ko |
dc.contributor.author | Jang, Yeju | ko |
dc.contributor.author | Kang, Hojin | ko |
dc.contributor.author | Back, Seoin | ko |
dc.contributor.author | Jang, Segeun | ko |
dc.contributor.author | Lee, Jinwoo | ko |
dc.date.accessioned | 2023-11-30T01:00:24Z | - |
dc.date.available | 2023-11-30T01:00:24Z | - |
dc.date.created | 2023-11-29 | - |
dc.date.issued | 2023-11 | - |
dc.identifier.citation | ADVANCED MATERIALS, v.35, no.46 | - |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.uri | http://hdl.handle.net/10203/315443 | - |
dc.description.abstract | Atomically dispersed and nitrogen coordinated iron catalysts (Fe-NCs) demonstrate potential as alternatives to platinum-group metal (PGM) catalysts in oxygen reduction reaction (ORR). However, in the context of practical proton exchange membrane fuel cell (PEMFC) applications, the membrane electrode assembly (MEA) performances of Fe-NCs remain unsatisfactory. Herein, improved MEA performance is achieved by tuning the local environment of the Fe-NC catalysts through defect engineering. Zeolitic imidazolate framework (ZIF)-derived nitrogen-doped carbon with additional CO2 activation is employed to construct atomically dispersed iron sites with a controlled defect number. The Fe-NC species with the optimal number of defect sites exhibit excellent ORR performance with a high half-wave potential of 0.83 V in 0.5 M H2SO4. Variation in the number of defects allows for fine-tuning of the reaction intermediate binding energies by changing the contribution of the Fe d-orbitals, thereby optimizing the ORR activity. The MEA based on a defect-engineered Fe-NC catalyst is found to exhibit a remarkable peak power density of 1.1 W cm−2 in an H2/O2 fuel cell, and 0.67 W cm−2 in an H2/air fuel cell, rendering it one of the most active atomically dispersed catalyst materials at the MEA level. | - |
dc.language | English | - |
dc.publisher | WILEY-V C H VERLAG GMBH | - |
dc.title | Insight into Defect Engineering of Atomically Dispersed Iron Electrocatalysts for High-Performance Proton Exchange Membrane Fuel Cell | - |
dc.type | Article | - |
dc.identifier.wosid | 001079475800001 | - |
dc.identifier.scopusid | 2-s2.0-85173876231 | - |
dc.type.rims | ART | - |
dc.citation.volume | 35 | - |
dc.citation.issue | 46 | - |
dc.citation.publicationname | ADVANCED MATERIALS | - |
dc.identifier.doi | 10.1002/adma.202302666 | - |
dc.contributor.localauthor | Lee, Jinwoo | - |
dc.contributor.nonIdAuthor | Choi, Eunho | - |
dc.contributor.nonIdAuthor | Jang, Ho Yeon | - |
dc.contributor.nonIdAuthor | Lee, Seonggyu | - |
dc.contributor.nonIdAuthor | Kang, Hojin | - |
dc.contributor.nonIdAuthor | Back, Seoin | - |
dc.contributor.nonIdAuthor | Jang, Segeun | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | atomically dispersed catalystsdefectsoxygen reduction reactionsproton exchange membrane fuel cells | - |
dc.subject.keywordPlus | OXYGEN REDUCTION REACTIONN-C CATALYSTSACTIVE-SITESCATHODE CATALYSTMETAL-CATALYSTSSPIN-STATEDURABILITYFE/N/C | - |
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