当前位置: X-MOL 学术Electrochem. Commun. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of graphene nanoplatelet edges on the iodide/triiodide redox reaction
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2017-12-11 , DOI: 10.1016/j.elecom.2017.12.009
Yuta Ohtani , Hajime Hoshi

Carbon electrodes have been extensively studied for the development of Pt-free dye-sensitized solar cells. In this study, the influence of graphene nanoplatelet edges on the activity of an electrolyte reaction was investigated. The reaction activities of graphene nanoplatelet aggregates (GNAs) and graphene nanoplatelets (GNs), which have different surface areas, were evaluated by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The charge transfer resistances (RCT) of the GNAs and GNs were determined from EIS to be 12 Ω and 1.4 × 103 Ω, respectively. The coefficient components (AW) of the diffusion impedance, known as the Warburg impedance, of GNAs and GNs were 63 Ω Hz0.5 and 1.2 × 102 Ω Hz0.5, respectively. From these results, it was found that the edge plane area of the graphene aggregates affects both the reaction resistance and electrolyte diffusion in the carbon film.



中文翻译:

石墨烯纳米片边缘对碘化物/三碘化物氧化还原反应的影响

碳电极已被广泛研究以开发无Pt染料敏化太阳能电池。在这项研究中,研究了石墨烯纳米片边缘对电解质反应活性的影响。通过循环伏安法和电化学阻抗谱(EIS)评价了具有不同表面积的石墨烯纳米片聚集体(GNA)和石墨烯纳米片(GNs)的反应活性。电荷转移电阻([R CT的GNAS和GNS的)从EIS确定为12Ω和1.4×10 3 分别Ω。GNA和GN的扩散阻抗(称为Warburg阻抗)的系数分量(A W)为63ΩHz 0.5和1.2×102  Ω赫兹0.5,分别。从这些结果发现,石墨烯聚集体的边缘平面面积影响碳膜中的反应阻力和电解质扩散。

更新日期:2017-12-11
down
wechat
bug