纳米TiO_2-Pt电极氧化Mn^(2+)制备苯甲醛

Electro-oxidation of Mn^(2+) and preparation of benzaldehyde by nanocrystalline TiO_2-Pt electrode

采用电化学合成法和电沉积法制备高活性钛基纳米TiO2-Pt(Ti/nano-TiO2-Pt)修饰电极,通过循环伏安法研究Ti/nano-TiO2-Pt电极对Mn2+氧化为Mn3+的电催化性能.结果表明,纳米TiO2-Pt修饰电极对Mn2+的电氧化有较高催化活性,非均相(3 mol/L H2SO4,2.5 mol/L MnSO4)电解氧化效率达90%以上.在无隔膜电解槽中,通过有机氧化甲苯正交实验确定其最佳条件为:温度60℃、硫酸浓度7.0 mol/L,苯甲醛产率为86.4%.

The high active Ti/nano-TiO2-Pt modified electrode was prepared by electrochemistry synthesis and electro-deposition. The cyclic voltammetry was adopted to study the electro-catalysis properties of Ti/nano-TiO2-Pt modified electrode for the oxidation process of Mn^2＋ to Mn^3＋. The results show that the Ti/nano-Pt modified electrode has a high catalystic activity of the electro-oxidation of Mn^2＋ , while the efficiency of non-homogeneous electrolysis oxidation （3 mol/L H2SO4, 2. 5 mol/L MnSO4） is over 90 %. The optimum conditions of organic oxidation were investigated through the orthogonal tests. The yield of benzaldehyde is 86.4% at 60 ℃ and the concentration of H2SO4 is 7.0 mol/L.