DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yeo, Kyeong-Rim | ko |
dc.contributor.author | Lee, Kug-Seung | ko |
dc.contributor.author | Kim, Hoyoung | ko |
dc.contributor.author | Lee, Jinwoo | ko |
dc.contributor.author | Kim, Soo-Kil | ko |
dc.date.accessioned | 2022-08-16T05:00:15Z | - |
dc.date.available | 2022-08-16T05:00:15Z | - |
dc.date.created | 2022-07-26 | - |
dc.date.created | 2022-07-26 | - |
dc.date.issued | 2022-08 | - |
dc.identifier.citation | ENERGY & ENVIRONMENTAL SCIENCE, v.15, no.8, pp.3449 - 3461 | - |
dc.identifier.issn | 1754-5692 | - |
dc.identifier.uri | http://hdl.handle.net/10203/297958 | - |
dc.description.abstract | Proton exchange membrane water electrolysis (PEMWE), the most energy-efficient low-temperature electrolysis method, is promising for converting intermittent renewable energies into stable hydrogen chemical energy. However, the cumulative corrosive environment resulting from the acidic conditions required and the positive half-cell potentials imply that only materials having high intrinsic activity and stability can be used. Herein, we propose catalysts and a corresponding fabrication method that meets these requirements. A 3D dandelion spore-structured self-supporting IrNi electrocatalyst is directly fabricated on a porous transport layer through the adsorbed H-induced co-electrodeposition of a core-shell IrNi-Ir structure. Subsequent dealloying generates a highly porous nanostructured Ir-based framework robust to the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in a wide pH range. Specifically, it exhibited overpotentials of 248 mV (OER) and 15 mV (HER) at +/- 10 mA cm(-2) in an acidic electrolyte with exceptional stability even after constant operation at 200 mA cm(-2) for 50 h (OER) or 5000 potential cycles (HER). When used as a bifunctional catalyst (0.67 mg cm(-2)) for PEMWE, 6.5 A cm(-2) was obtained at a cell voltage of 2.0 V. The degradation rate was only 1.58 mV h(-1) under extremely harsh test conditions of 2 A cm(-2) for 100 h, thus verifying the exceptional stability of a single cell. This is the first report of bifunctional catalysts with such high performance and stability fabricated using a simple method, and this work can aid the commercialization of PEMWE. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | A highly active and stable 3D dandelion spore-structured self-supporting Ir-based electrocatalyst for proton exchange membrane water electrolysis fabricated using structural reconstruction | - |
dc.type | Article | - |
dc.identifier.wosid | 000823949100001 | - |
dc.identifier.scopusid | 2-s2.0-85134666688 | - |
dc.type.rims | ART | - |
dc.citation.volume | 15 | - |
dc.citation.issue | 8 | - |
dc.citation.beginningpage | 3449 | - |
dc.citation.endingpage | 3461 | - |
dc.citation.publicationname | ENERGY & ENVIRONMENTAL SCIENCE | - |
dc.identifier.doi | 10.1039/d2ee01042a | - |
dc.contributor.localauthor | Lee, Jinwoo | - |
dc.contributor.nonIdAuthor | Yeo, Kyeong-Rim | - |
dc.contributor.nonIdAuthor | Lee, Kug-Seung | - |
dc.contributor.nonIdAuthor | Kim, Hoyoung | - |
dc.contributor.nonIdAuthor | Kim, Soo-Kil | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | OXYGEN EVOLUTION REACTION | - |
dc.subject.keywordPlus | OXIDE 2-DIMENSIONAL NANOFRAMES | - |
dc.subject.keywordPlus | IRIDIUM | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordPlus | TRENDS | - |
dc.subject.keywordPlus | METAL | - |
dc.subject.keywordPlus | DURABILITY | - |
dc.subject.keywordPlus | STABILITY | - |
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