carbon-based ORR catalysts in alkaline solution reported previously. Loading Half-wave TEN Samples Ref. potential (n) (mg vs. (V) cm−2) Pt/C (E1/2 vs RHE) N,S-3DPG 0.24 0.87 3.88~3.92 0.1M This KOH work N-doped carbon 0.025 ~0.74 3.27 0.1M 35 nanocages KOH CNT arrays / ~0.8 1.8~3.9 0.1M 36 KOH N-doped G 0.051 ~0.73 ~3.91 0.1M worse 37 KOH S-doped G / ~0.73 ~3.82 0.1M worse 10 KOH B,N-doped CNTs / ~0.75 ~3.7 0.1M worse 38 KOH N,S-codoped carbon 0.28 ~0.82 ~3.77 0.1M worse 39 KOH Co3O4/N-G 0.1 ~0.83 3.9 0.1M 40 KOH Fe,N,S-codoped carbon 0.1 ~0.81 3.6~4.0 0.1M worse 41 KOH CNT-G 0.485 ~0.87 / 0.1M 42 KOH g-C3N4/carbon composite ~0.085 ~0.70 3.12 0.1M worse 43 KOH 3. Supplementary Note Calculation of electron transfer number (n) and %H2O− for ORR Note S1. The Koutecky-Levich (K-L) plots were obtained by linear fitting of the reciprocal
carbon-based ORR catalysts in alkaline solution reported previously. Samples Loading (mg cm−2) Half-wave potential (V) (E1/2 vs RHE) TEN (n) vs. Pt/C Ref. N,S-3DPG 0.24 0.87 3.88~3.92 0.1M KOH This work N-doped carbon nanocages 0.025 ~0.74 3.27 0.1M KOH 35 CNT arrays / ~0.8 1.8~3.9 0.1M KOH 36 N-doped G 0.051 ~0.73 ~3.91 0.1M KOH worse 37 S-doped G / ~0.73 ~3.82 0.1M KOH worse 10 B,N-doped CNTs / ~0.75 ~3.7 0.1M KOH worse 38 N,S-codoped carbon 0.28 ~0.82 ~3.77 0.1M KOH worse 39 Co3O4/N-G 0.1 ~0.83 3.9 0.1M KOH 40 Fe,N,S-codoped carbon 0.1 ~0.81 3.6~4.0 0.1M KOH worse 41 CNT-G 0.485 ~0.87 / 0.1M KOH 42 g-C3N4/carbon composite ~0.085 ~0.70 3.12 0.1M KOH worse 43 3. Supplementary Note Note S1. Calculation of electron transfer number (n) and %H2O− for ORR The Koutecky-Levich (K-L) plots were obtained by linear fitting of the reciprocal