Figure 3: ORR catalytic properties. | Nature Communications

Figure 3: ORR catalytic properties.

From: Stable platinum nanoclusters on genomic DNA–graphene oxide with a high oxygen reduction reaction activity

Figure 3

(a) ORR polarization curves of the Ptn/gDNA–GO composite in an O2-saturated 0.1 M HClO4 solution with a sweep rate of 10 mV s−1 at different rotation speeds. (b) Corresponding K–L plots at different potentials. (c) Mass activity and (d) specific activity at 0.9 V versus reversible hydrogen electrode (RHE) for different catalysts. Mass and specific activities are given as kinetic current densities (jk) normalized in reference to the loading amount of metal and EASA (EASA from CO stripping), respectively. The metal loading on the rotating-disk electrode was ~11.3 μg cm−2 for Ptn/gDNA–GO, Pt nanoparticles/GO and Pt/C. In a the current density was normalized in reference to the geometric area of a rotating-disk electrode (0.0707, cm2).

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