Highlights A new and facile method to synthesize N, F-codoped microporous carbon nanofiber (N, F-MCF) electrocatalysts via electrospinning, hydrothermal process, and thermal treatment. Polyvinylidene fluoride is applied as a fluorine source in oxygen reduction reaction (ORR) catalysis for the first time in literature. N, F-MCFs exhibit distinguished electrocatalytic activity, stability, and methanol tolerance for ORR in alkaline media. Electronic supplementary material The online version of this article (10.1007/s40820-019-0240-x) contains supplementary material, which is available to authorized users.

Anodic TiO2 nanotubes have been studied widely for two decades because of its regular tubular structures and extensive applications. However, the forming mechanism of anodic TiO2 nanotubes remains unclear, because...

Owing to the great development potential of porous anodic oxides (PAO) in many fields, research on their formation mechanisms, fabrication processes and applications has a history of more than ten years.

Development of efficient electrocatalysts for oxygen reduction reaction (ORR) from resource-abundant, eco-friendly, and lowcost materials is important for environmental-friendly fuel cells. In this work, N, P, S/Fe-codoped carbon (FBCÀ 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. FBCÀ 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.

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