Carbon-encapsulated multi-phase nanocomposite of W2C@WC1-x as a highly active and stable electrocatalyst for hydrogen generation
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Inha | - |
dc.contributor.author | Park, Sung-Woo | - |
dc.contributor.author | Kim, Dong-Wan | - |
dc.date.accessioned | 2021-09-02T02:12:08Z | - |
dc.date.available | 2021-09-02T02:12:08Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2018-12-07 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/71224 | - |
dc.description.abstract | The major challenges related to the activity, stability, and cost of electrocatalysts are being increasingly raised to achieve highly efficient and cost-effective hydrogen generation. Herein, multiphase nanocomposites of W2C@WC1-x encapsulated within graphitic carbon layers were prepared via a facile and effective process of electrical explosion of wires and subsequent heat treatment to serve as a highly active and stable electrocatalyst without any noble metal for hydrogen generation. The single-phase comprising less than 15 nm WC1-x nanoparticles embedded in a lump of amorphous carbon were successfully synthesized via the EEW process in oleic acid used as a carbon source at room temperature. Subsequent heat treatment facilitates the desired phase transition of WC1-x to W2C without the formation of any secondary phases, maintaining the initial particle size and simultaneously eliminating excess amorphous carbon adhered to the nanoparticles. The few graphitic carbon layer-encapsulated nanoparticles with the main W2C phase prepared by this simple method exhibit high efficiency for hydrogen generation with a low overpotential of 240 mV at a current density of 10 mA cm(-2) and a low Tafel slope of 86 mV dec(-1). Moreover, the overpotential is well maintained at a constantly injected current density of 10 mA cm(-2) for 100 h with a low (100)/(i) value of 1.03 ((i): initial overpotential, (100): overpotential after 100 h), demonstrating superior catalytic stability in acidic media. This work proposes and evaluates a facile strategy for the synthesis of highly efficient electrocatalysts based on metal carbides without noble metals. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | TRANSITION-METAL CARBIDES | - |
dc.subject | NITROGEN-DOPED CARBON | - |
dc.subject | TUNGSTEN CARBIDE | - |
dc.subject | EVOLUTION REACTION | - |
dc.subject | ELECTRICAL EXPLOSION | - |
dc.subject | EFFICIENT | - |
dc.subject | NANOPARTICLES | - |
dc.subject | CATALYST | - |
dc.subject | W2C | - |
dc.subject | WC | - |
dc.title | Carbon-encapsulated multi-phase nanocomposite of W2C@WC1-x as a highly active and stable electrocatalyst for hydrogen generation | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Dong-Wan | - |
dc.identifier.doi | 10.1039/c8nr07221c | - |
dc.identifier.scopusid | 2-s2.0-85056927043 | - |
dc.identifier.wosid | 000451738900020 | - |
dc.identifier.bibliographicCitation | NANOSCALE, v.10, no.45, pp.21123 - 21131 | - |
dc.relation.isPartOf | NANOSCALE | - |
dc.citation.title | NANOSCALE | - |
dc.citation.volume | 10 | - |
dc.citation.number | 45 | - |
dc.citation.startPage | 21123 | - |
dc.citation.endPage | 21131 | - |
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 | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | TRANSITION-METAL CARBIDES | - |
dc.subject.keywordPlus | NITROGEN-DOPED CARBON | - |
dc.subject.keywordPlus | TUNGSTEN CARBIDE | - |
dc.subject.keywordPlus | EVOLUTION REACTION | - |
dc.subject.keywordPlus | ELECTRICAL EXPLOSION | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | CATALYST | - |
dc.subject.keywordPlus | W2C | - |
dc.subject.keywordPlus | WC | - |
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