Fig. 5. Electrocatalytic performance. (a) Oxide stripping curves and (inset) corresponding ECSAs, (b) CV curves of methanol electrooxidation, (c) summarized mass and specific activities, and (d) i–t chronoamperometric stability curves of mesoAu-74 nanospheres, and Au-4 and Au-70 NPs (at peak potentials). CVs and stability curves were collected in 0.5 M KOH and 2.0 M methanol at a scan rate of 20 mV s^–1, while oxide striping was performed in 0.5 M H₂SO₄ at a scan rate of 10 mV s^–1.