Ti/TiO_2膜电极在H_2SO_4和NaOH溶液中的电化学活化表面积  

Study on the Electro-Chemical Active Surface of the Ti/TiO_2 Film Electrodes by Polymeric Precursor Method in the H_2SO_4 Solutions and the NaOH Solutions

作　　者：童宏扬 王雅琼 许文林 

机构地区：[1]扬州大学,江苏扬州225002

出　　处：《稀有金属材料与工程》2005年第7期1081-1084,共4页Rare Metal Materials and Engineering

基　　金：江苏省高校自然科学研究计划项目(03KJB530164);国家自然科学基金资助项目(20176047)

摘　　要：应用循环伏安法研究了聚合前驱体热分解法制备的Ti/TiO2膜电极在pH=1的H2SO4溶液和pH=14的NaOH溶液中的电化学活化表面积。结果表明,相同条件下制备的Ti/TiO2膜电极在H2SO4溶液中的伏安电荷容量要远远高于在NaOH溶液中的伏安电荷容量,电极在不同pH值溶液中的内电化学活化表面积又远远高于外电化学活化表面积。因此电极表面活化表面积的大小与电极的结构以及溶液的pH值有关。The Ti/TiO2 film electrodes were prepared by polymeric precursor method (PPM). The voltammetric charges q* of Ti/TiO2 electrodes as the cathode in the H2SO4 solutions pH=1 and the NaOH solutions pH=14 were obtained by the cyclic voltammetry. The experimental results show that the voltammetric charge q* of the Ti/TiO2 in the H2SO4 solutions is much more than q* in the NaOH solutions at the same preparation condition, and 'inner' electro-chemical active surface is much more than 'outer' electro-chemical active surface. Therefore, the electro-chemical active surface of electrodes is related to the electrode surface structure and solutions pH.

关 键 词：TIO2 伏安电荷容量 电活化表面 电极 

分 类 号：O614.411[理学—无机化学]