Figure 8.

CV curves of the electrocatalysts (a) in a N₂-saturated 0.5 M H₂SO₄ solution at a scan rate of 20 mV s⁻¹, and (b) in a N₂-saturated 0.5 M H₂SO₄ + 1 M CH₃OH solution at a scan rate of 50 mV s⁻¹, (c) Tafel plots at a scan rate of 2 mV s⁻¹ and (d) CA curves at 0.6 V vs. SCE for 1800 s in a N₂-saturated 0.5 M H₂SO₄ + 1 M CH₃OH solution. Pt loading was 20 wt.%. The green dotted lines in (c) were used as guide to fit the Tafel plots.