The precious metal platinum (Pt) catalysts are suffering from some puddles owing to their high cost, dissolution and aggregation[1]. Thus, to cut down the amount of Pt or develop new catalysts becomes a crucial issue. Silver (Ag) is believed as a potential candidate to substitute Pt in Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Except for its abundance and low cost, Ag has relatively high ORR and OER activity and stability in alkaline electrolyte[2]. However, its performance has been reported to be low[3]. One of promising strategies for further increasing catalytic properties is to prepare a more conductive supporter coupled with some effective Nitrogen doped on carbon quantum dot (N-CQDs) catalysts [4]
