Combinatorial biomimetics: Optimization of a composition of copper(II) poly-L-histidine complex as an electrocatalyst for O2 reduction by scanning electrochemical microscopy

An array of Cu(super 2+) -poly-his spots with different composition was deposited on a glassy carbon (GC) substrate by the dispensing technique evaluating their electrocatalytic activity for oxygen reduction by scanning electrochemical microscopy and the electrolysis of O2 reduction at Cu(super 2+)-poly-his-modified GC electrodes were compared with bare GC electrodes. The results suggest an elecrocatalytic process for oxygen reduction at Cu(super 2+)-poly-his complex-modified GC electrodes.