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Citation: CHU Dao-Bao, HE Jian-Guo, HOU Yuan-Yuan, XU Mai, WANG Shu-Xi, WANG Jian, ZHA Long-Wu, ZHANG Xue-Jiao. Electrocatalytic Oxidation of Glyoxal on Ti/NanoTiO₂-Pt Modified Electrode[J]. Acta Physico-Chimica Sinica, ;2009, 25(07): 1434-1438. doi: 10.3866/PKU.WHXB20090751 shu

Electrocatalytic Oxidation of Glyoxal on Ti/NanoTiO₂-Pt Modified Electrode

1.
Key Laboratory of Molecular Based Materials, Anhui Key Laboratory of Functional Molecular Solids, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, Anhui Province, P. R. China

Received Date: 18 January 2009
Available Online: 26 May 2009

A nano-TiO2 film electrode loaded with Pt nanoparticles (Ti/nanoTiO2-Pt) was prepared by a sol-gel method and electrochemical deposition technique. The formation of an anatase phase of TiO2 was confirmed by X-ray diffraction (XRD). Scanning electron microscopy (SEM) images showed that cluster scattered state Pt particles were distributed on the surface of the multi-nanoporous TiO2 film and the average particle size of Pt particles was about 25 nm. The electrocatalytic oxidation of glyoxal on the Ti/nanoTiO2-Pt modified electrode was investigated by cyclic voltammetry (CV) and chronoamperometry. The results showed that the Ti/nanoTiO2-Pt modified electrode exhibited significant electrocatalytic activity for the oxidation of glyoxal. The oxidation peak potentials were 0.60 and 1.23 V (vs SCE (saturated calomel electrode)). Current densities were 16 and 42 mA·cm-2, respectively, and they were about 2 and 1.5 times as high as those of a pure Pt electrode. The reaction process was controlled by concentration diffusion.
- Electrocatalysis,
- Ti/nanoTiO2-Pt modified electrode,
- Direct oxidation,
- Glyoxal,
- Glyoxylic acid
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Electrocatalytic Oxidation of Glyoxal on Ti/NanoTiO₂-Pt Modified Electrode