One-step codoping of reduced graphene oxide using boric and nitric acid mixture and its use in metal-free electrocatalyst

• The B and N elements were codoped to reduce graphene oxide in one-step solution process.
• The codoped reduced graphene oxide (BN-rGO) exhibited excellent ORR activity.
• The BN-rGO showed better long-term durability and CO tolerance than those of the Pt/Cs.

In this study, the preparation of a highly efficient metal-free electrocatalyst, boron and nitrogen codoped reduced graphene oxide (BN-rGO), with an excellent durability is reported. The BN-rGO were prepared in one step using boric and nitric acid mixture, exhibiting highly improved oxygen reduction reaction (ORR) activity than those of the pristine GO and single doped rGOs. The electrocatalyst also showed the excellent long-term durability and CO tolerance than those of the commercial Pt/C catalysts.

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