to initiate substantial dissolution of Pt and consequently, also dissolution of the less noble metal. In other words, we wanted to probe how much of the less noble metal gets dissolved if we severely damage the "stable" Pt-rich surface. If parts II. and III. would be reversed, the WPW cycles (0.05-1.4 VRHE) could already substantially deplete the intrinsically unstable less noble metal from the Pt-rich overlayer and highly affect the results of the LPL studies presented in the next chapter. This is because the quantities of metal dissolution are substantially higher when Pt-based electrocatalysts are exposed to a wider potential window .