Enteromorpha as a seawater pollutant was innovatively converted into a functional carbocatalyst to driven Fenton-like reactions.After direct pyrolysis of Enteromorpha at 900 °C without additional chemicals, a large number of Fe clusters and single Fe sites are anchored onto N-doped carbon matrixes (Enteromorpha-derived Fe-N-C) with a high Fe loading of 0.84 wt.%. The Enteromorpha-derived Fe-N-C exhibits a high activity in the heterogeneous activation of peroxymonosulfate (PMS) for organic pollutant degradation. Radical quenching experiments and electrochemical analysis tests verify the nonradical oxidation by high-valence iron-oxo species and an electron-transfer pathway. The single Fe atoms, which only accounted for the minority of the Fe species in Fe-N-C, acted as the dominated reactive sites for the formation of highly oxidizing Fe^IV=O and Fe^V=O sites. This work unveils the evolution of bio-Fe in Enteromorpha during thermal pyrolysis and the role of the derived Fe-N-C in PMS activation and organic degradation.

肠morph虫作为海水污染物被创新地转化为功能性碳催化剂，以驱动Fenton样反应。肠Enter虫在900°C下直接热解而无其他化学物质后，大量Fe团簇和单个Fe位点锚定在N掺杂碳基质上（源自肠吗啡的Fe-NC），具有0.84 wt。％的高Fe含量。在浒苔衍生的Fe-NC在过氧单硫酸盐（PMS）的异质活化中表现出高活性，可降解有机污染物。自由基猝灭实验和电化学分析测试证明了高价铁氧合物种和电子转移途径的非自由基氧化作用。仅占Fe-NC中少量Fe种类的单个Fe原子充当形成高氧化Fe ^IV = O和Fe ^V = O位置的主要反应位。这项工作揭示了热裂解过程中肠morph中生物铁的演化以及衍生的铁NC在PMS活化和有机降解中的作用。