Bimetallic core-shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H-2 sensors and direct methanol fuel cells
DC Field | Value | Language |
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dc.contributor.author | Rashid, Muhammad | - |
dc.contributor.author | Jun, Tae-Sun | - |
dc.contributor.author | Jung, Yongju | - |
dc.contributor.author | Kim, Yong Shin | - |
dc.date.accessioned | 2021-06-22T20:23:07Z | - |
dc.date.available | 2021-06-22T20:23:07Z | - |
dc.date.created | 2021-01-21 | - |
dc.date.issued | 2015-03 | - |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/18799 | - |
dc.description.abstract | Bimetallic core-shell Ag@Pt nanoparticles (NPs) attached on multiwall carbon nanotube (Ag@Pt-MWNT) were synthesized via the formation of Ag NPs on a MWNT surface through chemical reduction and subsequent galvanic replacement of Ag with PtCl62-. The successful synthesis of Ag@Pt-MWNT was confirmed by probing chemical compositions, absorption, and microstructures using various material analysis methods (UV-vis, SEM, EDS, and TEM). The bimetallic particles were found to have a core-shell structure in the TEM image: an Ag core with an average size of approximately 7 nm was enclosed by a shell composedof small Pt NPs. The electrochemical surface area of the Ag@Pt-MWNT-modified glassy carbon electrode was 896 cm(2)/mg, which was 1.5 times higher than that of commercial 20 wt% Pt-C (E-Tek). The Ag@Pt-MWNTs electrode also exhibited a higher peak current for methanol oxidation than those of comparable Pt-MWNT and Pt-C under the same amount of Pt loading, thus providing evidence for its higher electro-catalytic activity and CO tolerance. Furthermore, an amperometric gas-sensing electrode was fabricated by filtering an Ag@Pt-MWNT solution on a porous PTFE sheet. The as-fabricated electrode displayed a high sensitivity of 1.1 mu A/ppm in H-2 detection and an excellent linear response over the wide concentration range of 5-1000 ppm, together with fairly good detection times and long-term stability. This enhanced performance was correlated and discussed to be a result of the unique nanostructural features of the Ag@Pt core-shell structure with a porous Pt layer and the strong anchoring of the bimetallic NPs on the activated MWNT surface, which provides a highly active surface area and effective interactions between Ag and Pt. (C) 2014 Elsevier B.V. All rights reserved. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Elsevier BV | - |
dc.title | Bimetallic core-shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H-2 sensors and direct methanol fuel cells | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Yong Shin | - |
dc.identifier.doi | 10.1016/j.snb.2014.11.005 | - |
dc.identifier.scopusid | 2-s2.0-84911452221 | - |
dc.identifier.wosid | 000346000500002 | - |
dc.identifier.bibliographicCitation | Sensors and Actuators, B: Chemical, v.208, pp.7 - 13 | - |
dc.relation.isPartOf | Sensors and Actuators, B: Chemical | - |
dc.citation.title | Sensors and Actuators, B: Chemical | - |
dc.citation.volume | 208 | - |
dc.citation.startPage | 7 | - |
dc.citation.endPage | 13 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalResearchArea | Instruments & Instrumentation | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Analytical | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Instruments & Instrumentation | - |
dc.subject.keywordPlus | MULTIWALLED CARBON NANOTUBES | - |
dc.subject.keywordPlus | GALVANIC REPLACEMENT | - |
dc.subject.keywordPlus | CATALYTIC-ACTIVITY | - |
dc.subject.keywordPlus | HOLLOW | - |
dc.subject.keywordPlus | GRAPHENE | - |
dc.subject.keywordPlus | NANOSTRUCTURES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | MEMBRANE | - |
dc.subject.keywordAuthor | Ag@Pt-MWNT electrode | - |
dc.subject.keywordAuthor | Galvanic replacement reaction | - |
dc.subject.keywordAuthor | Amperometric H-2 sensor | - |
dc.subject.keywordAuthor | Direct methanol fuel cell | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0925400514013598?via%3Dihub | - |
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