Oxygen reduction performance of O-C-650, O-BC-0.5-650, O-BC-1-650, O-BC-2-650, and O-BC-3-650 in 0.1 mol L−1 KOH solution: (A) LSV curves, (B) the number of transferred electrons as a function of the potential, (C) calculated H2O2 selectivity, and (D) H2O2 selectivity and electron transfer number comparison at 0.55 V, showing the relationship between both activity and selectivity and B content. (IMAGE)

Science China Press

Oxygen reduction performance of O-C-650, O-BC-0.5-650, O-BC-1-650, O-BC-2-650, and O-BC-3-650 in 0.1 mol L−1 KOH solution: (A) LSV curves, (B) the number of transferred electrons as a function of the potential, (C) calculated H2O2 selectivity, and (D) H2O2 selectivity and electron transfer number comparison at 0.55 V, showing the relationship between both activity and selectivity and B content.

Caption

The effect of the amount of dopant source boric acid used on the performance of the ORR is investigated. The H2O2 yields for the samples decrease in the order of O-BC-2-650 > O-BC-1-650 > O-BC-0.5-650 > O-BC-3-650 > O-C-650, indicating that B doping is beneficial to 2e− ORR selectivity.

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