Enhanced electrocatalytic oxygen reduction performance of nonprecious V2O5-WO3 nanocomposite

This paper presents the first report of the excellent oxygen reduction activity and durability of a composite structure that consists of highly active V 2 O 5 -WO 3 electrocatalyst. Outstanding electrocatalytic performance toward oxygen reduction under alkaline medium was achieved by selecting a highly active and optimum concentration of V 2 O 5 on WO 3 composite. In particular, the excellent catalytic activity of the 25 wt.% V 2 O 5 with 75 wt.% WO 3 (WV[Formula: see text] catalyst for oxygen reduction reaction (ORR) can be attributed to the optimum concentration of V 2 O 5 , high surface area, high conductivity, and mesoporous nature, since they aid facile electrochemical activity and reduced overpotential and small Tafel values than other catalysts. In addition, it exhibits long-term durability.