Synthesis of W, Nb and Ta doped α-Mo₂C and Their Application as Counter Electrode in Dye-sensitized Solar Cells

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• 作者：J. Theerthagiri^a ; R.A. Senthil^a ; M.H. Buraidah^b ; J. Madhavan^a ; ^{jagan.madhavan@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; A.K. Arof^b
• 关键词：α-MoO3 ; α-Mo2C ; Counter electrode ; Dye-sensitized solar cells ; Electrocatalytic activity
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：supp_S1
• 页码：S65-S72
• 全文大小：619 K

文摘

The nanowire-shaped α-MoO₃ and various metal-doped (W, Nb and Ta) α-MoO₃ was synthesized by hydrothermal route. The synthesized metal oxides were converted into corresponding carbides by carburization method using urea as carbon source. The synthesized carbides were characterized by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM) and the electrocatalytic activity for triiodide reduction was studied by cyclic voltammetry. The order of electrocatalytic activity of the synthesized materials are, W-α-Mo₂C > α-Mo₂C > Ta-α-Mo₂C > Nb-α-Mo₂C. The dye-sensitized solar cell fabricated with W-α-Mo₂C counter electrode found to show the better power conversion efficiency (2.53± 0.02%) than pure α-Mo₂C, Nb and Ta-doped α-Mo₂C. This study indicates that the W-doped α-Mo₂C is a potential electrocatalyst for the applications in cost-effective dye-sensitized solar cells.