A saturated mercury/mercurous sulphate electrode (MSE) was
used as reference, but all redox potential values will be given with
respect to the standard hydrogen electrode (SHE) (ESHE = EMSE +
0.651 V). An Ametek PAR 501 potentiostat monitored by the Soft
Corr III software was used for recording the potential vs. time
curves. The potential of the platinum grid was followed, with one
measurement performed every 9 104 s, this being the maximum
measurement rate of the apparatus