The stability of poly(o-phenylenediamine) as an electrode material

The kinetics of the electrochemical degradation of poly(o-phenylenediamine) (POPD), deposited on platinum electrode, has been investigated at controlled electrode potential in 0.5 M sulfuric acid solution. The degradation process follows the first-order kinetics and depends on the electrode potential. Within the potential range investigated, −0.1 to 0.9 V, the degradation rate constants (k) were found to vary between approximately 1.5×10−5 and 4.4×10−5 s−1, and a linear dependence of these constants on the degradation potential (E) has been found with the slope of k vs. E of ca. 2.9×10−5 s−1 V−1.