fig6

Figure 6. Electrochemical catalysis of PtCu aerogels. (A) CV curves measured at 30 ℃ in Ar-saturated 0.1 M HClO₄ with a sweep rate of 50 mV/s. (B) ORR polarization curves measured at 30 ℃ in O₂-saturated 0.1 M HClO₄ with a sweep rate of 5 mV/s and a rotation rate of 1600 rpm. (C) Mass and specific activities at 0.9 V vs. RHE. (D) CO-stripping curves measured at 30 ℃ in Ar-saturated 0.1 M HClO₄ with a sweep rate of 20 mV/s. (E) Mass activities at 0.9 V vs. RHE before and after 5000 cycles of CV. (F) ECSAs before and after 5000 cycles of CV.