通过溶胶-凝胶法在Ti表面修饰一层纳米TiO2/CNT/ZrO2复合膜，采用循环伏安和电解合成法研究了复合膜电极在离子液体1-甲基-3-乙基咪唑四氟硼酸盐([EMI]BF4)中对2-吡啶甲醛的电催化还原活性. 结果表明，复合膜为多孔网状结构，粒径约20 nm的TiO2和ZrO2晶粒负载在管径40~60 nm的碳纳米管(CNT)上，纳米TiO2中掺杂ZrO2和CNT后电极催化性能显著改善. 在[EMI]BF4中，控制电位为-1.40 V，用复合膜电极作阴极，Ti(IV)/Ti(III)氧化还原电对作为媒质间接电还原2-吡啶甲醛为2-哌啶甲醇，平均电流效率为85.6%，产率为83%. 反应机理为电化学偶联随后化学催化反应.

Nano-TiO2/CNT/ZrO2 complex film was prepared by sol-gel process, on the nanoTiO2/CNT/ZrO2 composite film electrode, electrocatalytic reduction of 2-pyridinaldehyde in the ionic liquid electrolyte of 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMI]BF4) was studied by cyclic voltammetry and bulk electrolysis. The results showed that the composite film had a porous mesh structure, TiO2 and ZrO2 particles were about 20 nm, which were loaded on carbon nanotubes (CNT) with the diameter of about 40~60 nm, the catalytic performance of nano-TiO2 modified by ZrO2 and CNT was greatly improved. In the indirect electroreduction of 2-pyridinaldehyde to 2-piperidinemethanol by Ti(IV)/Ti(III) redox system on nanoTiO2/CNT/ZrO2 complex film surface in [EMI]BF4, the yield and current efficiency were approximately 83% and 85.6% at -1.40 V, respectively. The electrode reaction mechanism was the called catalytic mechanism.