Nevertheless, although we can assume that already after 5000 cycles a significant rate of degradation has been achieved, the results show that further cycling will give rise to a linear increase in degradation. On the other hand, taking into account the difference in the length of ADTs (approximately 20 hours for 10 000 cyclesan over-night experiment; and 60 hours for 30 000 cyclesan-over a weekend experiment) and by the results, we can conclude that we already gain sufficient data on the degradation of an electrocatalyst already after 10 000 cycles under the specified ADT protocol conditions. Consequently, to establish a compromise between valuable information on ADTs and time requirements, we have determined that the RDE-level stability tests can be carried out by performing 10 000 cycles of ADT, instead of 30 000 cycles proposed by the DoE. Thus, for this research, all further ADTs are performed by running 10 000 cycles of ADT (an overnight experiment). In continuation, we have tested the hypothesis based on our prior work that further narrowing of the potential window below 0.6-0.95 V will have a severe impact on the degradation of the Pt-alloy cathodes. Figure represents a comparison of performing the same 10 000 cycles of the trapezoid-wave high-temperature ADTs but changing (narrowing) the potential window. More precisely, the LPL has been varied from 0.6 to 0.7 VRHE, whereas the UPL has been varied from 0.95 to 0.85 VRHE. In accordance to the expectations, clear evidence of a dramatically decreased loss of ECSACO (Figure ), SA (Figure ), Co loss (Figure )