to observe a trend in dissolution (about the applied potential window) as well as the dissolution mechanism highly relevant for Pt-based NPs. the hold time at UPL. This is in line with the observation from Della Bella et al., which has shown in the MEA setup that not only a higher UPL but also a longer hold time results in a higher decrease of the cathode's roughness factor due to an increase in Pt dissolution/redeposition, resulting in faster H2/air performance degradation.