N-doped WO3 anchored on porous carbon as boosted oxygen reduction catalyst for zinc–air batteries†
Abstract
N-doped WO3 anchored on porous carbon (N–WO3/PNC) was synthesized as an efficient oxygen reduction catalyst. The N doping reduced the overpotential of WO3 during oxygen reduction. N–WO3/PNC displayed a half-wave potential of 0.85 V. An N–WO3/PNC-based zinc–air battery displayed a high power density of 209.7 mW cm−2.