DC Field | Value | Language |
---|---|---|
dc.contributor.author | Song, DongHoon | ko |
dc.contributor.author | Hong, Doosun | ko |
dc.contributor.author | Kwon, YongKeun | ko |
dc.contributor.author | Kim, HyoWon | ko |
dc.contributor.author | Shin, Jaewook | ko |
dc.contributor.author | Lee, Hyuck Mo | ko |
dc.contributor.author | Cho, EunAe | ko |
dc.date.accessioned | 2020-07-22T01:55:07Z | - |
dc.date.available | 2020-07-22T01:55:07Z | - |
dc.date.created | 2020-07-15 | - |
dc.date.created | 2020-07-15 | - |
dc.date.created | 2020-07-15 | - |
dc.date.issued | 2020-06 | - |
dc.identifier.citation | JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.24, pp.12069 - 12079 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | http://hdl.handle.net/10203/275586 | - |
dc.description.abstract | The development of high-efficiency catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to lower the energy losses during water electrolysis. Herein, a highly porous Ni-P (HP Ni-P) electrode, prepared by an ultrafast electrodeposition within only ten seconds, is presented with superior electrocatalytic activity towards both HER and OER in alkaline media: overpotentials of 96 and 323 mV are required to reach a current density level of 100 mA cm(-2)for HER and OER, respectively, with corresponding Tafel slopes of 32.9 and 44.0 mV dec(-1). Experimental analyses and theoretical calculations show that charge transfer occurs from Ni to P and the HER kinetics is accelerated by the increased hydrogen coverage, enhanced water dissociation ability, and optimized hydrogen adsorption energy on the HP Ni-P. Under OER conditions, surface P is oxidized into PO43-, promoting oxidation of Ni to OER-active NiOOH and exposing abundant OER-active sites on the HP Ni-P surface. An alkaline electrolysis cell was constructed with HP Ni-P as the cathode and anode (Ni-P||Ni-P) and outperformed the Pt/C||IrO(2)cell at cell voltages exceeding 1.68 V. This work provides a practically applicable method to prepare HER and OER electrodes for use in industrial water electrolyzers, with insight into the activities of the catalysts. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Highly porous Ni-P electrode synthesized by an ultrafast electrodeposition process for efficient overall water electrolysis | - |
dc.type | Article | - |
dc.identifier.wosid | 000542473000014 | - |
dc.identifier.scopusid | 2-s2.0-85087441191 | - |
dc.type.rims | ART | - |
dc.citation.volume | 8 | - |
dc.citation.issue | 24 | - |
dc.citation.beginningpage | 12069 | - |
dc.citation.endingpage | 12079 | - |
dc.citation.publicationname | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.identifier.doi | 10.1039/d0ta03739g | - |
dc.contributor.localauthor | Lee, Hyuck Mo | - |
dc.contributor.localauthor | Cho, EunAe | - |
dc.contributor.nonIdAuthor | Shin, Jaewook | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | HYDROGEN EVOLUTION REACTION | - |
dc.subject.keywordPlus | BIFUNCTIONAL ELECTROCATALYSTS | - |
dc.subject.keywordPlus | DOUBLE-LAYER | - |
dc.subject.keywordPlus | NICKEL | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | COBALT | - |
dc.subject.keywordPlus | ALLOY | - |
dc.subject.keywordPlus | ELECTROCHEMISTRY | - |
dc.subject.keywordPlus | SUPERSTRUCTURES | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
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