Sm/Co Dual‐Site Doped PrFeO 3 Perovskite Hybridized With CNTs as Bifunctional Electrocatalysts for Rechargeable ZABs

Perovskite structures have attracted widespread attention in the field of catalysis. Among them, PrFeO 3 exhibits excellent chemical stability, yet its catalytic performance is often suboptimal. In this study, samarium (Sm) and cobalt (Co) were doped into the PrFeO 3 lattice via a sol–gel method, yielding a Pr 0.6 Sm 0.4 Fe 0.4 Co 0.6 O 3 catalyst with significantly enhanced electrocatalytic performance, exhibiting an onset potential of 0.91 V, a half‐wave potential of 0.793 V, and a |Δ E | value of 0.996 V. After compositing with carbon nanotubes (CNTs) via high‐energy ball milling, the resulting bifunctional catalyst (CNT/Pr 0.6 Sm 0.4 Fe 0.4 Co 0.6 O 3 ) showed slightly reduced performance, with an onset potential of 0.86 V, a half‐wave potential of 0.74 V, and a |Δ E | of 1.038 V; however, its limiting current density increased to −4.24 mA·cm −2 , suggesting suitability for high‐power operation. When employed as the cathode material in a rechargeable zinc–air battery, the device delivered a power density of 159.60 mW·cm −2 , which is 144% higher than that of a commercial Pt/C‐based battery and achieved stable charge–discharge cycling for up to 250 h.