The influence of fluoride media and CH3CN on the voltammetric behavior of ferrocene, quinhydrone, and methyl phenyl sulfide on Pt and carbon electrodes

Cyclic voltammetric behavior of ferrocene, quinhydrone, and methyl phenyl s ulfide on Pt, glassy carbon (GC) and polypropylene composite graphite (CPP) electrodes are compared in TBAP/CH3CN, triethylamine (TEA).3HF/CH4CN and T EA.3HF media. In medium containing CH3CN, the voltammetric behavior of titl e compounds are quite similar in the absence and presence of fluoride ions. The voltammetric features vary only slightly, due to some adsorption effec ts and catalytic hydrogen evolution on Pt. In TEA.3KF medium, all three ele ctrodes show significantly higher background currents in the middle potenti al region itself. The peak potential and the charge transfer rate constant of these compounds are also found to be significantly different in TEA.3HF room temperature melt. The analytical implications of these medium effects are also discussed.