Study on the Electrochemistry of a Na3[Ti2P2O10F]·xH2O-Modified Glassy Carbon Electrode

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• 作者：Xiaopei Miao^† ; ^‡ ; ; Guobao Li^† ; ; Jingbo Hu^‡ ; ; Zhiwei Zhu^† ; ; Yuanhua Shao^† ; ; Meixian Li*^† ;
• 刊名：Journal of Physical Chemistry C
• 出版年：2009
• 出版时间：March 19, 2009
• 年：2009
• 卷：113
• 期：11
• 页码：4592-4596
• 全文大小：200K
• 年卷期：v.113,no.11(March 19, 2009)
• ISSN：1932-7455

文摘

A new oxyfluorinated titanium phosphate Na₃[Ti₂P₂O₁₀F]·xH₂O (TiP)-modified electrode was prepared by casting the dispersion of TiP on a glassy carbon electrode. The electrochemical behavior of the modified electrode was investigated by cyclic voltammetry, and a couple of reduction/reoxidation peaks corresponding to the reduction of Ti (IV) were found at −1.29 V versus SCE in the 0.1 M NaCl solution, which was supported by UV−vis and FTIR characterization. The modified electrode showed electrocatalysis toward the reduction of H₂O₂. Furthermore, the addition of phosphate in the supporting electrolyte resulted in an easier reduction of Ti(IV) and direct electron transfer of cytochrome c at the modified electrode due to changes in the surface structure of the TiP films. The results indicate that TiP can act as not only a good electron-transfer mediator but also an electron-transfer promoter.