Figure 5

Electrochemical properties of catalysts before and after ADTs. The changes in (a) the ORR polarization curves (E1/2 indicates the half-wave potential of the catalysts in the ORR polarization curves measured before the ADTs), (b) the specific activities at 0.9 VRHE for the ORR, and (c) the CVs for PtCo/C and PtCo/C-PNIPAM before and after the ADTs. ADT, accelerated durability test; CV, Cyclic voltammogram; ORR, oxygen reduction reaction.