Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (03): 373-377.doi: 10.3866/PKU.WHXB20060324

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Heterogeneous Electrocatalytic Reduction of Furfural on Nanocrystalline TiO2-CNT Complex Film Electrode in DMF Solution

CHU Dao-Bao; ZHANG Li-Yan; ZHANG Jin-Hua; ZHANG Xiu-Mei; YIN Xiao-Juan   

  1. Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China; Department of Chemistry, Chizhou Normal Technological Academy, Chizhou 247000, P. R. China
  • Received:2005-09-22 Revised:2005-10-26 Published:2006-03-10
  • Contact: CHU Dao-Bao E-mail:dbchu@sina.com

Abstract: 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 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.

Key words: Furfural, Electrocatalytic reduction, Furfural alcohol, Nanocrystalline TiO2, Carbon nanotube, Complex film electrode