Figure 5.

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

Ex-situ EDX-STEM analysis of Pt-M/C electrocatalysts (B) after PCA (200 cycles in 0.1 M HClO₄, 0.05–1.2 V_RHE, 300 mV s⁻¹, Ar saturated, 600 rpm) and (C) after ADT (5000 cycles in 0.1 M HClO₄, 0.4–1.2 V_RHE, 1 V s⁻¹, Ar saturated, 600 rpm). A minimum of four large areas containing several hundred nanoparticles were measured each time. For more EDX-STEM of Pt-M/C electrocatalysts see also Supplemental informationFiguresS2–S9. The colors in the bar graphs (Pt = black, Cu = blue, Fe = orange, Ni = red and Co = magenta) correspond to the atomic percentage ratios.