Abstract
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.
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