Fluorine enhanced pyridinic-N configuration as an ultra-active site for oxygen reduction reaction in both alkaline and acidic electrolytes

An ultra-active metal-free ORR electrocatalyst (F–N-AC-1000) was developed by fluorine doped N-based activated carbon. The as-prepared F–N-AC-1000 exhibited half-wave potentials of 0.89 V and 0.75 V (vs. RHE) in alkaline and acidic electrolytes, respectively, which are both among the most active met...

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