中文摘要：

制备了碳纳米管／纳米TiO2复合膜修饰电极（B）和纯纳米膜修饰电极（A）。用XRD，TEM和循环伏安及计时库仑比较了A和B的电化学性能差异。结果表明，大量细小的碳纳米管的存在，可起到阻碍TiO2纳米粒子的团聚作用。碳纳米管独特的原子结构，能在电化学反应中促进电子传递，大大提高了B的电化学性能；B的循环伏安图中氧化还原峰电流比A的高出两倍多，单位时间通过电极的电量大幅度增加；通过对马来酸的异相电催化还原反应进一步证明了B比A具有更高的电催化活性。

英文摘要：

C-Nanotube/nano-TiO2 complex film-modified electrode （B） and pure nano-TiO2 filmmodified electrode（A） were prepared. The difference in electrochemical performance between A and B was researched by XRD, TEM, cyclic voltammetry and chronocoulometry. The results showed that the existence of a great deal of carbon nanotubcs can block the agglomeration of nano-TiO2 particles. The unique atomic structure of carbon nanotube can accelerate the electron transfer in electrochemical reaction. Compare to A, the current value of the second redox peak of B was about twice higher than A, and the quantity of electric charge increased greatly at the same time. So we can conclude that B exhibites better electrocatalytic activity than A, and it was further proved by the heterogeneous electrocatalytic reduction of maleic acid.