https://scholars.lib.ntu.edu.tw/handle/123456789/412042
標題: | Tri-iodide Reduction Activity of Shape- and Composition-Controlled PtFe Nanostructures as Counter Electrodes in Dye-Sensitized Solar Cells | 作者: | Chang, P.-J. Cheng, K.-Y. Chou, S.-W. Shyue, J.-J. Yang, Y.-Y. Hung, C.-Y. Lin, C.-Y. Chen, H.-L. Chou, H.-L. Chou, P.-T. |
公開日期: | 2016 | 卷: | 28 | 期: | 7 | 起(迄)頁: | 2110-2119 | 來源出版物: | Chemistry of Materials | 摘要: | PtFe alloy nanostructures enclosed by differently oriented facets, including polyhedrons, concave cubes, and nanocubes, were synthesized through the fine adjustment of specific surfactant-crystal facet bindings. PtFe nanostructures with various alloy compositions were then employed as the counter electrodes (CEs) for the redox reaction of iodide/tri-iodide (I-/I3-) in dye-sensitized solar cells. Devices with the Pt9Fe1 polyhedrons and Pt9Fe1 concave cubes produced better photovoltaic conversion efficiency (PCE) of 8.01% and 7.63% in comparison to the PCE of 7.24% achieved with Pt CE. The superiority is attributed to the rapid charge transfer, higher limit current, and better electronic conductivity and catalytic activity with respect to the Pt CEs. The photovoltaic and electrochemical results indicated the shape- and composition-dependent activity in the I-/I3- redox reaction, which obeys the sequence of polyhedrons > concave cubes > nanocubes and Pt9Fe1 nanostructures > Pt7Fe3 nanostructures. Further theoretical work indicated that the I3- reduction activity of the nanosurfaces was in the order of Pt9Fe1(111) > Pt(111) > Pt9Fe1(100). The combination of experimental and theoretical work thus clearly demonstrates the shape- and composition-dependence of PtFe nanostructures in terms of the I3- reduction activity. © 2016 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964771531&doi=10.1021%2facs.chemmater.5b04962&partnerID=40&md5=fa09a2689d506f975364887580da6cfd https://scholars.lib.ntu.edu.tw/handle/123456789/412042 |
DOI: | 10.1021/acs.chemmater.5b04962 | SDG/關鍵字: | Catalyst activity; Charge transfer; Electrodes; Geometry; Iron alloys; Nanostructures; Platinum; Redox reactions; Reduction; Solar cells; Alloy compositions; Composition dependence; Counter electrodes; Electronic conductivity; Fine adjustments; Iodide/tri-iodide; Photovoltaic conversion; Reduction activity; Dye-sensitized solar cells |
顯示於: | 化學系 |
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