The two shortcomings of the Fenton-like catalyst delafossite-type oxide (CuFeO₂) lie in its spontaneous agglomeration and deactivation under neutral working pH. To remedy these drawbacks, novel Fenton-like catalyst chitosan-derived maillard reaction productions coated CuFeO₂ with abundant oxygen vacancies (OV–CuFeO₂@MRPs) was synthesized by hydrothermal method with no extra chemical reducing agent. The systemic characterization illustrated that richer oxygen vacancies and higher particles dispersion of OV-CuFeO₂@MRPs contributed to better Rhodamine B (RhB) degradation under neutral pH compared to pure CuFeO₂. Cooper antisite defects in OV-CuFeO₂@MRPs were evidenced by X-ray powder diffraction (XRD), fourier transform infrared spectrometer (FTIR), Raman spectra and energy dispersive X-ray spectrometer (EDX) linescan. To keep the charge balance, OV-CuFeO₂@MRPs should form rich oxygen vacancies, which was confirmed by X-ray photoelectron spectroscopy (XPS) and solid-state electron paramagnetic resonance spectrometer (solid-state EPR). Furthermore, the electrochemical impedance spectroscopy (EIS) analysis revealed that oxygen vacancies could improve the electron transfer. Scavenging experiments and electron spin resonance spectroscopy (ESR) analysis demonstrated that OH was main active radical during Fenton-like reaction, and the density functional theory (DFT) calculation verified that the oxygen vacancy could effectively adsorb H₂O₂ and elongate O–O bond of H₂O₂, thus promoting the activation of H₂O₂ into OH.

类芬顿催化剂铜铁矿型氧化物 (CuFeO ₂ )的两个缺点在于其在中性工作 pH 值下自发团聚和失活。为了弥补这些缺点，新颖类芬顿催化剂壳聚糖衍生的美拉德反应生产涂覆CuFeO ₂具有丰富的氧空位（OV-CuFeO _2个@MRPs）通过水热法合成，没有额外的化学还原剂。系统表征表明，与纯 CuFeO ₂相比，OV-CuFeO ₂ @MRPs更丰富的氧空位和更高的粒子分散有助于在中性 pH 下更好地降解罗丹明 B (RhB) 。OV-CuFeO _{2 中的}Cooper反位缺陷@MRP 由 X 射线粉末衍射 (XRD)、傅立叶变换红外光谱仪 (FTIR)、拉曼光谱和能量色散 X 射线光谱仪 (EDX) 线扫描证明。为了保持电荷平衡，OV-CuFeO ₂ @MRPs 应形成丰富的氧空位，X 射线光电子能谱 (XPS) 和固态电子顺磁共振光谱仪 (固态 EPR) 证实了这一点。此外，电化学阻抗谱（EIS）分析表明氧空位可以改善电子转移。清除实验和电子自旋共振光谱（ESR）分析表明，OH是类芬顿反应的主要活性自由基，密度泛函理论（DFT）计算证实氧空位可以有效吸附H₂ O ₂和延长 H ₂ O _{2 的}O-O 键，从而促进 H ₂ O ₂活化为OH。