Shape-Dependent Electrocatalytic Reduction of CO to CO on Triangular Silver Nanoplates.
Electrochemical reduction of CO (CORR) provides great potential for intermittent renewable energy storage. This study demonstrates a predominant shape-dependent electrocatalytic reduction of CO to CO on triangular silver nanoplates (Tri-Ag-NPs) in 0.1 M KHCO. Compared with similarly sized Ag nanopar...
| Publicado en: | Journal of the American Chemical Society Vol. 139; no. 6; pp. 2160 - 2164 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Chemical Society
2/15/2017
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=121320785&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 121320785 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 2/15/2017 vid: 139 iid: 6 pid: 997 pub: American Chemical Society artinfo: ui: 121320785 10.1021/jacs.6b12103 ppf: 2160 ppct: 4 formats: tig: atl: Shape-Dependent Electrocatalytic Reduction of CO to CO on Triangular Silver Nanoplates. aug: au: Subiao Liu Hongbiao Tao Li Zeng Qi Liu Zhenghe Xu Qingxia Liu Jing-Li Luo affil: Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada su: Carbon dioxide reduction Carbon monoxide Silver nanoparticles Electrocatalysis Density functional theory sug: subj: Carbon dioxide reduction Carbon monoxide Silver nanoparticles Electrocatalysis Density functional theory ab: Electrochemical reduction of CO (CORR) provides great potential for intermittent renewable energy storage. This study demonstrates a predominant shape-dependent electrocatalytic reduction of CO to CO on triangular silver nanoplates (Tri-Ag-NPs) in 0.1 M KHCO. Compared with similarly sized Ag nanoparticles (SS-Ag-NPs) and bulk Ag, Tri-Ag-NPs exhibited an enhanced current density and significantly improved Faradaic efficiency (96.8%) and energy efficiency (61.7%), together with a considerable durability (7 days). Additionally, CO starts to be observed at an ultralow overpotential of 96 mV, further confirming the superiority of Tri-Ag-NPs as a catalyst for CORR toward CO formation. Density functional theory calculations reveal that the significantly enhanced electrocatalytic activity and selectivity at lowered overpotential originate from the shape-controlled structure. This not only provides the optimum edge-to-corner ratio but also dominates at the facet of Ag(100) where it requires lower energy to initiate the rate-determining step. This study demonstrates a promising approach to tune electrocatalytic activity and selectivity of metal catalysts for CORR by creating optimal facet and edge site through shape-control synthesis. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2017 holdings: @attributes: islocal: N |
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