A straightforward polymerization-pyrolysis strategy to prepare N, P, S triply doped carbon nanosheets as efficient electrocatalyst for oxygen reduction reaction

Non-metallic carbonaceous catalysts for oxygen reduction reaction (ORR) hold great promise for applications in zinc-air batteries (ZABs). Their performance is substantially dictated by the type and quantity of heteroatoms doped within the carbon lattice. Herein, a novel polymerization-pyrolysis strategy is proposed to prepare N, P, S triply doped carbon nanosheets (NPS-C) and regulate the amount of doped atoms. The optimized sample showcases excellent ORR catalytic performance, featuring a half-wave potential of 0.81 V vs. RHE and high long-term stability. When employed as the cathode catalyst in primary ZABs, the resulting battery delivers a high peak power density of 157.9 mW cm −2 , along with high specific capacity and good rate capability. This work provides a simple and effective strategy for developing non-precious carbon-based electrocatalysts, offering new possibilities for enhancing the performance of energy storage and conversion devices.