- We observed that the electrochemical active surface area (ECSA, m2/g) fully disappeared after some cycles of cyclic voltammetry in acidic media.
- The CV measurement (Potential window = -0.2 ~ 1.0 V vs. Ag/AgCl) was performed after N2 purging (3-electrode system)
- The currents for PtO reduction and proton sorption fully disappeared, resulting in showing only the EDLC area.
- By ex-situ measurement, we found that the Pt electrocatalyst still remained.
- Why was the ECSA diminished even if the Pt was remained?
Oleg Brylev
please, give more details on the experiment (especially, potential limits)
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