Next, CV curves at different scan rates were registered to estimate the ESA of the WE within the 3DPEC, as seen in Fig. . This experiment revealed high, well-developed peak currents with negligible impact from non-Faradaic phenomena. It should be noted that the iP,C is considerably lower than the iP,A, suggesting a hindered reduction process and reaction irreversibility. Simultaneously, skewed peak shape and notable peak-to-peak separation E is caused by the ohmic drop iR due to the use of CB-PLA as both WE and CE . The series resistance within 3DPEC exceeds 1.1 k, as measured by EIS (Fig. ). While there are means to compensate iR drop, its effect largely depends on the pre-assumptions regarding the studied system .