Generation of SO₄^•- anchored on metal oxides via radical transfer from ^•OH to surface SO₄^2- functionality (^•OH → SO₄^•-) is singular, unraveled recently, and promising to decompose aqueous refractory contaminants. The core in furthering supported SO₄^•- production is to reduce the energy required to accelerate the rate-determining step of the ^•OH → SO₄^•- (^•OH desorption), while increasing the collision frequency between the ^•OH precursors (H₂O₂) and H₂O₂ activators (Lewis acidic metals) or between SO₄^2--attacking radicals (^•OH) and supported SO₄^•- precursors (SO₄^2-). Herein, Mn-substituted Fe₃O₄ oxo-spinels (Mn_XFe_3-XO₄; Mn_X) served as reservoirs to accommodate the Lewis acidic Fe/Mn and SO₄^2-, whose properties were tailored by altering the metal compositions (X). The production of supported SO₄^•- via the ^•OH → SO₄^•- was of high tangibility, as confirmed by their electron paramagnetic resonance spectra coupled with those simulated. A concave trend was observed in the plot of the Lewis acidic strength of Fe/Mn versus X of Mn_X with the minimum at X∼ 1.5. Hence, Mn_1.5 could expedite ^•OH liberation from the surface most proficiently and therefore exhibited the greatest initial H₂O₂ scission rate, as corroborated by its lowest energy barrier needed for activating the ^•OH → SO₄^•-. Meanwhile, a volcano-shaped trend was found in the plot of SO₄^2- concentration versus X of Mn_X (other than Mn₃). This could tentatively increase the collision frequency between ^•OH and SO₄^2- on the surface of Mn_1.5, as partially substantiated by its second largest pre-factor among the catalysts. Therefore, Mn_1.5 exhibited the highest phenol consumption rate (-r_{PHENOL, 0}) among the catalysts, which was ∼20-fold larger than those for SO₄^2--modified Fe₂O₃ and NiO, which we reported previously. Mn_1.5 also outperformed other catalysts in recycling phenol degradation, fragmenting another pollutant (aniline), and mineralizing phenol/aniline.

的SO代₄ ^{• -}通过从自由基转移锚固在金属氧化物^• OH表面SO ₄ ^2-的功能（^• OH→SO ₄ ^{• -} ）是单数，最近解开，并有希望的分解含水耐火污染物。进一步促进支持的SO ₄ ^•-生产的核心是减少加速^• OH→SO ₄ ^•-（^{- •} OH解吸）的速率确定步骤所需的能量，同时增加^• OH前体（H ₂ O ₂）和H ₂O ₂活化剂（路易斯酸性金属）或在SO ₄ ^2-攻击自由基（^• OH）与负载的SO ₄ ^•-前体（SO ₄ ^2-）之间。此处，Mn取代的Fe ₃ O ₄氧代尖晶石（Mn _X Fe _3-X O ₄； Mn _X）用作储存路易斯酸性Fe / Mn和SO ₄ ^2-的储层，其性质是通过改变金属来调整的成分（X）。生产支持SO ₄ ^{• -}经由^• OH→SO ₄ ^{• -}由它们的电子顺磁共振光谱和模拟的光谱证实，其具有较高的可塑性。Fe / Mn的路易斯酸性强度对Mn X的_X的曲线中观察到凹形趋势，其最小值在X〜1.5。因此，Mn _1.5可以最充分地促进^• OH从表面的释放，因此表现出最大的初始H ₂ O ₂断裂速率，这由活化^• OH→SO ₄ ^•-所需的最低能垒所证实。同时，在SO ₄ ^2-浓度与Mn _X（Mn以外的_X）的曲线图中发现了火山状的趋势。₃）。这可能会暂时增加Mn _1.5表面上^• OH与SO ₄ ^2-之间的碰撞频率，这在某种程度上被其在催化剂中的第二大前置因子所证实。因此，Mn _1.5表现出最高的苯酚消耗率（-r _PHENOL，0），比我们先前报道的SO ₄ ^2-改性的Fe ₂ O ₃和NiO的约高20倍。锰_1.5在循环苯酚降解，破碎另一种污染物（苯胺）和使苯酚/苯胺矿化方面也胜过其他催化剂。