引用本文:
褚道葆, 沈广霞, 朱琼霞, 周幸福, 林昌健. 纳米TiO2电极在不同介质中的电化学行为[J]. 应用化学,
2002, 19(7): 633-636.
Citation: CHU Dao-Bao, SHEN Guang-Xia, ZHU Qiong-Xia, ZHOU Xing-Fu, LIN Chang-Jian. Electrochemical Behavior of the Nano-TiO2 Electrode in Different Solutions[J]. Chinese Journal of Applied Chemistry, 2002, 19(7): 633-636.
Citation: CHU Dao-Bao, SHEN Guang-Xia, ZHU Qiong-Xia, ZHOU Xing-Fu, LIN Chang-Jian. Electrochemical Behavior of the Nano-TiO2 Electrode in Different Solutions[J]. Chinese Journal of Applied Chemistry, 2002, 19(7): 633-636.
纳米TiO2电极在不同介质中的电化学行为
摘要:
采用循环伏安法、循环方波伏安法、线性扫描等电化学暂态方法研究了纳米TiO2电极在不同介质中的阴、阳极电化学行为,考察了酸的种类、酸度、电位、温度等条件对电极的电化学性质及稳定性的影响.结果发现,在非氧化性酸(H2SO4、HCl)介质中存在2对可逆氧化还原峰,可逆半波电位E1/2r分别为-0.52和-0.86V,峰电流和峰电位受酸度、酸中阴离子的影响很小;在氧化性酸(H2C2O4、HNO3)介质中则呈现一种异相表面电催化行为;在碱性和中性(KOH、KCl)介质中纳米TiO2电极的阴极电化学行为呈现半可逆氧化还原行为.在阳极扫描区间(-0.5~1.5V)内,纳米TiO2电极均呈现惰性.
English
Electrochemical Behavior of the Nano-TiO2 Electrode in Different Solutions
Abstract:
The electrochemical behavior of the nano-TiO2 electrode in different solutions were investigated by electrochemically transient methods, such as cyclic voltammetry, cyclic Osteryoung square wave voltammetry and linear potential sweep techniques as function of acid species, acidity, potential and temperature. The results showed that there were two pairs of reversible redox peaks, which were hardly affected by the acidity and anions of acids, and E1/2r in non-oxidative acid solutions(H2SO4,HCl) was -0.52 V and -0.86 V, respectively. However, in oxidative acid solutions(H2C2O4,HNO3), there appeared a surface heterogeneous electrocatalytic behavior, but electrochemically half reversible behavior, in alkaline and neutral solutions(KOH,KCl). The nano-TiO2 electrode behaved sluggishly in anode scan range of -0.5~1.5 V.
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