Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (10): 1238-1242.doi: 10.3866/PKU.WHXB20061013

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Electrocatalytic Oxidation of Ethanol on Pt/nanoTiO2-CNT Complex Catalysts

CHU Dao-Bao;YIN Xiao-Juan;FENG De-Xiang;LIN Hua-Shui;TIAN Zhao-Wu   

  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, State Key Laboratory for Physical Chemistry of the Solid Surface, Xiamen University, Xiamen 361005, P. R. China
  • Received:2006-02-20 Revised:2006-03-29 Published:2006-10-11
  • Contact: CHU Dao-Bao

Abstract: Pt/nanoTiO2-CNT complex catalysts were prepared by direct hydrolysis of Ti(OEt)4 and electrochemical scan electrodepositing method. The results of XRD and SEM showed that the nanoTiO2 (anatase) and Pt nanoparticles (size about 5~10 nm) were dispersed uniformly on CNT film surface. The electrocatalytic activity of Pt/nanoTiO2-CNT electrode was investigated by cyclic voltammetry and chronopotentiogram. The results indicated that Pt/nanoTiO2-CNT electrode (Pt loading was 0.32 mg•cm−2) exhibited high electrochemical activity surface area (51.8 m2•g−1) and very high electrocatalytic activity and stability for the electro-oxidation of ethanol at room temperature in atmosphere pressure. The oxidation peak potentials of ethanol were 0.59, 0.96, and 0.24 V, and the corresponding oxidation peak current sdensities were −115, −113, and −75 mA•cm−2. The high electrocatalytic activity and good stability can be attributed to the synergistic catalytic effect among nanocomposite.

Key words: Electro-oxidation of ethanol, Direct ethanol fuel cell, Anode catalyst, Nanocrystalline TiO2, Carbon nanometer tubes, Pt nanoparticle