N, P, S/Fe‐codoped Carbon Derived from Feculae Bombycis as an Efficient Electrocatalyst for Oxygen Reduction Reaction

Abstract Development of efficient electrocatalysts for oxygen reduction reaction (ORR) from resource‐abundant, eco‐friendly, and low‐cost materials is important for environmental‐friendly fuel cells. In this work, N, P, S/Fe‐codoped carbon (FBC−Fe) with hierarchical porous structure was successfully prepared by the simple pyrolysis of feculae bombycis (FB) in the presence of ferric nitrate and followed by an acid etching process. FBC−Fe exhibits an excellent long‐term durability and a remarkable methanol‐resistance as well as a high electrocatalytic activity (E onset : 0.92 V vs RHE, E 1/2 : 0.81 vs RHE, and electron transfer number: 4.1) comparable to commercial platinum–carbon (Pt/C, 20 wt.%) catalysts for the ORR in alkaline media. This low‐cost and simple approach provides a straightforward route to synthesize excellent electrocatalysts for ORR from biomass.