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

Table 3

ORR electrocatalytic parameters of graphite, PPy, and Mn/PPy catalysts obtained by RDE voltammograms (scan rate: 5 mV s⁻¹) in O₂-saturated 0.1 M KOH at 1600 rpm.

WE	, V/RHE	, V/RHE	at  V/RHE/mA cm^−2	at 0.8 V
Poly-Pt	0.871	0.72	4.12
Graphite	0.82	0.7	1.78
PPy on graphite (PPy/G)	0.85	0.69	2.16
Mn-PPy on graphite (Mn-PPy60/G)	0.846	0.65	1
Mn-PPy on graphite (Mn-PPy240/G)	0.9	0.714	1.65