Scans were performed with a potential step width of 4 mV, 50 mV amplitude, 0.06 s pulse width, 0.02 s sample width, and a 0.5 s pulse period at a measurement sensitivity of 10 µA/V. The integrated positive feedback function of the CHI760E bipotentiostat was used for iR-compensation at a compensation level of 82%. At first, background scans were performed with a freshly polished GC disc electrode. Afterward, 10 µL of the respective 1.5 µM PbS solutions in n-hexane were dropcasted on the freshly cleaned GC working electrode. Sample measurements were performed in reductive and oxidative direction with the same parameters as the background scans and freshly prepared PbS coatings were used for each measurement.