dc.citation.conferencePlace |
KO |
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dc.citation.title |
2017년도 한국전기화학회 춘계총회 및 학술발표회 |
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dc.contributor.author |
권도형 |
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dc.contributor.author |
주명종 |
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dc.contributor.author |
백종범 |
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dc.date.accessioned |
2023-12-19T19:10:09Z |
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dc.date.available |
2023-12-19T19:10:09Z |
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dc.date.created |
2018-01-10 |
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dc.date.issued |
2017-04-07 |
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dc.description.abstract |
Metal-free carbon-based electrocatalysts for dye-sensitized solar cells (DSSCs) are sufficiently active in Co(II)/Co(III) electrolytes, but are not satisfactory in the traditional iodide/triiodide (I-/I3-) electrolyte. Thus, the active and stable metal-free carbon-based catalysts in both electrolytes are highly needed. Here, we report the synthesis of edge-selenated graphene nanoplatelets (SeGnPs) and its electrocatalytic activities in both Co(II)/Co(III) and I-/I3- electrolytes for DSSCs. The SeGnPs can be prepared by a simple mechanochemical reaction between graphite and Se powders, and the edge-selective doping and preservation of the pristine graphene basal plane in the SeGnPs were confirmed by various analytical techniques, including atomic-resolution transmission electron microscopy (AR-TEM). Tested as counter electrode (CE) for DSSCs in both Co(bpy)32+/3+ (bpy=2,2'-bipyridine) and I-/I3- electrolytes, the SeGnP-CEs exhibited outstanding electrocatalytic activity with an ultimately high stability. Furthermore, the I3- reduction mechanism, which has not been fully understood on carbon-based CE materials to date, was clarified by an electrochemical kinetics study combined with density functional theory (DFT) and non-equilibrium Green’s function (NEGF) calculations. |
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dc.identifier.bibliographicCitation |
2017년도 한국전기화학회 춘계총회 및 학술발표회 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/38507 |
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dc.language |
영어 |
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dc.publisher |
한국전기화학회 |
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dc.title |
Edge selenium-doped graphene nanoplatelets as durable metal-free cathodes for iodine reduction reaction in dye-sensitized solar cells |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2017-04-06 |
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