引用本文:
褚道葆, 王凤武, 魏亦军, 姚文俐, 李晓华. 纳米TiO2-Pt修饰电极的制备及电催化活性[J]. 物理化学学报,
2004, 20(02): 182-185.
doi:
10.3866/PKU.WHXB20040215
Citation: Chu Dao-Bao, Wang Feng-Wu, Wei Yi-Jun, Yao Wen-Li, Li Xiao-Hua. Electrocatalytic Activities and Preparation of Nanocrystalline TiO2 -Pt Modified Electrode[J]. Acta Physico-Chimica Sinica, 2004, 20(02): 182-185. doi: 10.3866/PKU.WHXB20040215
Citation: Chu Dao-Bao, Wang Feng-Wu, Wei Yi-Jun, Yao Wen-Li, Li Xiao-Hua. Electrocatalytic Activities and Preparation of Nanocrystalline TiO2 -Pt Modified Electrode[J]. Acta Physico-Chimica Sinica, 2004, 20(02): 182-185. doi: 10.3866/PKU.WHXB20040215
纳米TiO2-Pt修饰电极的制备及电催化活性
摘要:
采用电化学合成前驱体直接水解法和电沉积法制备高活性纳米TiO2-Pt修饰电极，并使用扫描电子显微镜(SEM)对电极的表面形貌和结构进行了表征; 通过循环伏安法研究了纳米TiO2-Pt修饰电极在H2SO4溶液中的电化学行为以及对Mn2＋氧化为Mn3＋的电催化活性. 结果表明,纳米TiO2的晶粒大小约30 nm,修饰在纳米TiO2膜表面的Pt微粒呈现单分散状态,平均粒径约60 nm,纳米TiO2-Pt修饰电极的电化学性能优于纯Pt电极,对Mn2＋的电氧化具有高催化活性,非均相无隔膜电解氧化Mn2＋生成Mn3＋平均电流效率可达86％.
English
Electrocatalytic Activities and Preparation of Nanocrystalline TiO2 -Pt Modified Electrode
Abstract:
The nanocrystalline TiO2-Pt modified titanium (Ti/nano-TiO2-Pt) electrode was prepared by electrosynthesis and direct hydrolysis and electrodeposited Pt on nanocrystalline TiO2 film. SEM was used to characterize the structure of Ti/nano-TiO2-Pt (Pt micro particle 60 nm). Redox behaviors of the Ti/nano-TiO2-Pt electrode, as well as the electrocatalytic activity of the Ti/nano-TiO2-Pt electrode for Mn2＋ oxydized to Mn3＋ were investigated by cyclic voltammetry and bulk electrolysis. The results indicated that there was high electrocatalytic activity of the Ti/nano-TiO2-Pt electrode for Mn2＋ oxydized to Mn3＋; The electrocatalytic activity of the Ti/nano-TiO2-Pt electrode was higher than Pt electrode. In preparative electrolysis under heterogeneous optimal conditions, average current efficiency for Mn3＋ was 86％.
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