Peracetic Acid (PAA) has emerged as an alternative candidate oxidant for H₂O₂ and persulfate-mediated catalytic oxidation. However, the sluggish kinetics of Fe³⁺/Fe²⁺ recycling still severely causes its limited applications. In this work, boron, for the first time, a metal-free and inexpensive co-catalyst, was introduced into the Fe³⁺/PAA Fenton-like system to remarkably accelerate the Fe²⁺ regeneration, further facilitating organic wastewater decontamination (an almost 145.0-fold kinetic increase on BPA removal). More excitingly, the crystalline nature of boron significantly modulated the activation system, and the crystalline boron and amorphous boron exhibited contrasting Fe³⁺ reduction characteristics. The amorphous boron-contained system enabled ultra-fast deterioration of various micro-pollutants. Validation experiments and theoretical calculations demonstrate that the surface B-B bonds with the formed interfacial suboxide boron continuously donated electrons to boost the rapid reduction of Fe³⁺. This work opens a new research avenue to promote the application of Fe³⁺-activated PAA systems with high activity in continuity and also guides the development of a new series of co-catalysts in wastewater treatment.

过氧乙酸 (PAA) 已成为 H ₂ O ₂和过硫酸盐介导的催化氧化的替代候选氧化剂。然而，Fe ³⁺ /Fe ²⁺再循环的缓慢动力学仍然严重导致其应用受限。在这项工作中，硼是一种不含金属且价格低廉的助催化剂，首次将硼引入类 Fe ³⁺ /PAA Fenton 体系中，显着加速了 Fe ²⁺的再生，进一步促进了有机废水的去污（一种BPA 去除后动力学增加近 145.0 倍）。更令人兴奋的是，硼的结晶性质显着调节了活化系统，结晶硼和非晶硼表现出对比鲜明的 Fe³⁺还原特性。无定形含硼系统能够超快速地降解各种微污染物。验证实验和理论计算表明，表面BB键与形成的界面低氧化硼连续提供电子以促进Fe ³⁺的快速还原。^{该工作为促进具有高连续活性的Fe 3+}活化PAA体系的应用开辟了新的研究途径，同时也指导了一系列新型助催化剂在废水处理中的开发。