Figure 6.

ex-situ STEM comparison of Pt-M/C FCS electrocatalysts after PCA and after ADT

STEM analysis of all four Pt-M/C electrocatalysts (A–D) after PCA (600 rpm, Ar saturated, 200 cycles in 0.1 M HClO₄, 0.05–1.2 V_RHE, 300 mV s⁻¹) and (E–H) after ADT (600 rpm rotation, Ar saturated, 5000 cycles in 0.1 M HClO₄, 0.4–1.2 V_RHE, 1 V s⁻¹). Additional STEM BF and HAADF analyses are available in Supplemental information, Figures S10–S17. The colors (Pt-Cu = blue, Pt-Fe = orange, Pt-Ni = red and Pt-Co = magenta) correspond to the ones used for the graphs and borders in all of the figures.