Accurate Assessment of the Oxygen Reduction Electrocatalytic Activity of Mn/Polypyrrole Nanocomposites Based on Rotating Disk Electrode Measurements, Complemented with Multitechnique Structural Characterizations

Table 2

AFM surface morphology indicators of graphite, PPy, and Mn/PPy samples.

Sample	Ideally flat	Graphite (G)	PPy on graphite (PPy/G)	Mn/PPy on graphite (Mn-PPy60/G)	Mn/PPy on graphite (Mn-PPy240/G)
Particle size/nm	/	/
/nm	0
/nm	0
Surface area/m^2	100

⁢ = average roughness.
⁢ = root mean square roughness.