CV measurements were performed in the same full-glass electrochemical cell setup as the DPV measurements. Measurements were started at the respective OCP and performed as six segments with a scan rate of 0.01 V/s, sample intervals of 1 mV and a sensitivity of 10 µA/V. For oxidative scans, the high potential was set at 0.7 V, reductive scans were done up to -0.8 V, -1 V and -1.6 V. The iR-compensation of the CHI760E bipotentiostat was used at a compensation level of 82%. Background scans were performed with a freshly polished GC working electrode. For each PbS measurement 10 µL of the respective 1.5 µM PbS solution was freshly dropcasted onto the clean GC electrode. The applied potentials were referenced against an Fc/Fc + value of 83 mV.