Mercury films on gold/quartz electrodes were prepared using a potentiostatic method and a potentiodynamic method: the repeated cyclic voltammetry technique. The film formation was confirmed using the electrochemical quartz crystal microbalance method; 17 µg of mercury film was deposited per cycle. The electrochemical deposition of mercury film on the gold/quartz substrate was evaluated with respect to a quartz crystal microbalance cell, deposition time, and the concentration of mercury. Electrochemical studies have shown that cobalt (II), pilocarpine, and a cobalt-pilocarpine complex are catalytically reduced more efficiently on a mercury-modified gold/quartz electrode than on a bare gold/quartz electrode. In addition, atomic force microscopy images clearly showed the structure of the adsorbed cobalt-pilocarpine complex molecule layers on mercury-modified gold/quartz electrode.
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