Abstract
Ferrocene-bridged polysilsesquioxanes film electrodes were prepared via depositing the sols formed by hydrolysis of 1,1′-bis[(2-triethoxylsilyl)ethyl]ferrocene (BTEF) or co-hydrolysis of poly(vinylalcohol) (PVA) with BTEF or tetraethoxysilane (TEOS) with BTEF onto glassy carbon electrode (GCE) surface. The electrochemical behavior of the modified electrodes were characterized by cyclic voltammogram (CV) in aqueous solution. The BTEF film, BTEF/PVA film and BTEF/TEOS film all exhibit a redox wave at E0’ are 0.504, 0.326, 0.318 V, with the peak potential separation (ΔE) are 0.132, 0.042, 0.028 V, and the value of ipa/ipc are 1.8097, 1.007, 1.064 (vs. SCE), respectively. This suggests that BTEF/PVA film and BTEF/TEOS film have a good reversible redox behavior and the redox peak is corresponded to a one-electron reduction and oxidation process. After successive 50 time’s cyclic voltammetric, there is no peak potential shift, and the peak current only decreased 5.58, 4.95%, respectively. BTEF/PVA film has better hydrophilicity and shows a more perfect electrocatalytic activity in the oxidation of H2A than that of the BTEF/TEOS film. The catalytic peak current has a linear relationship with the concentration of H2A in the range of 1.0 × 10−5~1.0 × 10−3 M.
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This work ws asupported by National Nature Science Foundation of China. Grant No. 20573071 and Province Natural Science Foundation of Shanxi. Grant No. 20041017.
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Chen, J., Zhang, T., Gao, C. et al. Modifiying glassy carbon electrode with ferrocene-bridged polysilsesquioxanes. J Sol-Gel Sci Technol 55, 293–298 (2010). https://doi.org/10.1007/s10971-010-2248-z
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DOI: https://doi.org/10.1007/s10971-010-2248-z