Applications of EQCN Selected Examples

In order to illustrate the usefulness and the capability of the EQCN method selected examples from different areas of electroanalytical chemistry will be shown below. 

The redox pair of [Fe(CN)6] /[Fe(CN)6] is frequently used as a test system, e.g., in cyclic voltammetry (see Sect. II. 1.5.3) or rotating disk electrode studies, assuming an uncomplicated electrode reaction. However, as seen in Fig. II. 10.3, the characteristic cyclic voltammetric curves of [Fe(CN)6] ions are accompanied with a frequency decrease during reduction and an increase during oxidation. 

2 Underpotential Deposition of Hydrogen and Oxygen on Ft and Rh Surfaces and the Effect of the Electrochemical Double Layer 

By the help of the piezoeleetrie nanogravimetry, the oxide formation and reduetion on noble metal electrodes ean well be followed as seen in Figs, n.10.4 and II.10.5. 

5 Cyclic voltammogram continuous line) and the simultaneously obtained EQCM frequency curve dotted line) for a rhodium electrode in contact with 1 mol dm H2SO4 solution. Scan rate 5 mV 

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