The acidification potential of the nickel foam system was approximately 15 times larger than the Pd/C system, as can be seen in Figure . In the nickel foam system, the platinum electrode production was responsible for 92% of the total impact in this category even though a lifetime of 1500 runs had been applied in the calculations. Electricity production from downstream (DS) processes and the catalyst production represented the hotspots in the Pd/C system, corresponding to 52% and 42% each.