An effective strategy is proposed to enhance the oxygen reduction reaction (ORR) performance of multiwall carbon nanotubes (MWCNTs) in both acid and alkaline electrolytes by coating them with a layer of biomass derivative N‐doped hydrothermal carbons. The N‐doped amorphous carbon coating plays triple roles: it (i) promotes the assembly of MWCNTs into a 3D network therefore improving the mass transfer and thus increasing the catalytic activity; (ii) protects the Fe‐containing active sites, present on the surface of the MWCNTs, from H₂O₂ poisoning; (iii) creates nitrogenated active sites and hence further enhances ORR activity and robustness.

中文翻译：

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低成本壳聚糖衍生的N掺杂碳增强了多壁碳纳米管的电催化活性

提出了一种有效的策略，通过在生物膜上涂覆一层生物质衍生的N掺杂水热碳来增强酸性和碱性电解质中多壁碳纳米管（MWCNT）的氧还原反应（ORR）性能。N掺杂的无定形碳涂层起着三重作用：（i）促进MWCNT组装成3D网络，从而改善了传质并因此提高了催化活性；（ii）保护存在于多壁碳纳米管表面的含铁活性位点免受H ₂ O ₂中毒；（iii）产生氮化的活性位点，并因此进一步增强ORR活性和健壮性。