中文摘要：

通过在乙醇中电化学溶解Ti金属阳极合成前驱体Ti（OEt）4和溶胶-凝胶法在Ti表面修饰一层纳米TiO2-碳纳米管（nanoTiO2-CNT）复合膜,采用循环伏安和电解合成法研究了nanoTiO2-CNT复合膜电极在N, N-二甲基甲酰胺（DMF）中的氧化还原行为以及对糠醛（furfural）还原的电催化活性.结果发现,nanoTiO2-CNT电极在阴极扫描时有两对氧化还原峰,可逆半波电位E1/2^r分别为-1.27 V和-2.44 V（vs SCE,扫描速度100mV·s-1）,分别对应于TiO/2 Ti2O3氧化还原电对的可逆电极过程和TiO2/Ti（OH）3电对的准可逆电极过程;在DMF电解液中nanoTiO2-CNT复合膜中的Ti（Ⅳ）/Ti（Ⅲ）氧化还原电对作为媒质间接电还原糠醛为糠醇,反应机理为电化学偶联随后化学催化反应（EC′）机理.

英文摘要：

The precursor Ti（OEt）4 was prepared by anodic dissolution of metallic titanium in absolute ethanol and directly hydrolyzed to prepare nanocrystalline TiO2-carbon nanotube（nanoTiO2-CNT） complex film by a sol-gel process. Redox behavior and electrocatalytic activities of the nanoTiO2-CNT complex film electrode were investigated by cyclic voltammetry（CV） and bulk electrolysis in DMF solution. It was found that there were two pairs of well-defined redox peaks for nanoTiO2-CNT complex film electrode with E1/2^r of -1.27 V and -2.44 V（vs SCE） at 100 mV·s^-1 in correspondence with TiO2/Ti2O3 reversible and TiO2/Ti（OH）3 quasi-reversible electrode process, and the heterogeneous electrocatalytic reduction activities of TiO2/Ti（OH）3 redox system for furfural; The indirect electroreduction of furfural to furfural alcohol by Ti（Ⅳ）/Ti（Ⅲ） redox system on nanoTiO2-CNT complex film surface in DMF. The electrode reaction mechanism is the called catalytic （EC＇） mechanism.