Figure shows that the concentrations of substrates (O2, H2Q, and H2Q-O2) decrease triggered by the generation of O2 •- and PRC (H2Q-O2 •-) forming PC and other product species. Notably, the concentrations of PRC and PC (Q •--H2O2) increase with the same potential, which suggests that the formed PRC immediately became PC. Additionally, the maximum concentration of PC (red dashed line, square) was higher than that of PRC (red solid line, circle). The concentration of H2O2 (blue square) begin to increase, and H2O2 production continued steadily (Figure ). ). The diagrams were traced using the parameters listed in Table .