Effect of Different Support Morphologies and Pt Particle Sizes in Electrocatalysts for Fuel Cell Applications

Figure 4

Cyclic voltammogram of Pt/MWCNT (C) catalyst with enhanced 𝐻_upd region (a), cyclic voltammogram of Pt/MCMB (D) catalyst with enhanced 𝐻_upd region (b). Both samples were measured in 0.1 M HClO₄ (dashed line) and 0.1 M HClO₄ + 1 M CH₃OH (solid line) at a scan rate of 30 mV/s. The fifth cycle is shown in all cases.

(a)

(b)