Electrocatalytic Reduction Of Furfural And Carbon Dioxide On Nanocrystalline TiO₂-CNT Complex Film Electrode

The paper is composed of the following two parts:First, Heterogeneous Electrocatalytic Reduction of Furfural on Nanocrystalline TiO2-CNT Complex Film Electrode in DMF Solution. 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 Er1/2–1.27 V and–2.43 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(Ⅲ)/Ti(Ⅳ) redox system on nanoTiO2-CNT complex film surface in DMF. The electrode reaction mechanism is the called catalytic(EC′)mechanism.Second, Electroreduction of Carbon Dioxide on Nanocrystalline TiO2-CNT Complex Film Electrode in tetrabutylammonium bromide solution and fixation of Carbon Dioxide to organic compounds. First, electrochemical activities of TiO2-CNT Complex film electrode in the reduction of CO2 were studied by cyclic voltammetry. Second, the fixation of CO2 was investigated by controlled-potential electrolyses on Nanocrystalline TiO2-CNT Complex Film Electrode in tetrabutylammonium bromide solution. Electrolysis fixation product were identified...