Table 3.

Relevant ORR parameters for commercial Pt/C and activated carbons prepared.

Sample	Eonset vs. RHE	jL (mA cm−2)	ñ O2	Tafel Slopes (mV dec−1) *
Pt/C (20 wt %)	0.94	−4.70	4.0	89
rGO325-3	0.81	−3.40	2.6	98
rGO100-3	0.80	−2.92	2.2	48
rGO10-3	0.80	−3.46	3.1	65
NrGO325-4	0.82	−4.05	3.9	62
NrGO100-4	0.80	−3.94	3.3	99
NrGO10-4	0.79	−3.03	3.0	78

* normalized by the mass of catalysts