| 乙二醛在Ti/纳米TiO2-Pt修饰电极上的电催化氧化 |
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| 引用本文： | 褚道葆,何建国,侯源源,徐迈,王树西,王建,查龙武,张雪娇.乙二醛在Ti/纳米TiO2-Pt修饰电极上的电催化氧化[J].物理化学学报,2009,25(7):1434-1438. |
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| 作者姓名： | 褚道葆 何建国 侯源源 徐迈 王树西 王建 查龙武 张雪娇 |
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| 作者单位： | 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 |
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| 摘 要： | 采用溶胶-凝胶和电沉积法制备Ti基纳米TiO2-Pt(Ti/纳米TiO2-Pt)修饰电极. X射线衍射(XRD)表明纳米TiO2为锐钛矿型, 扫描电镜(SEM)显示Pt纳米粒子在纳米TiO2多孔膜的表面呈现簇分散状态, 平均粒径约25 nm. 通过循环伏安(CV)和计时电流法研究了Ti/纳米TiO2-Pt修饰电极对乙二醛直接电氧化的电催化活性, 结果表明, 修饰电极对乙二醛的直接电氧化呈现良好的催化活性, 在0.60和1.23 V(vs SCE)出现两个氧化峰, 二者电流密度分别为16 和42 mA·cm-2, 约为纯Pt电极的2倍和1.5倍, 反应过程受浓差扩散控制.
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| 关 键 词： | 电催化 Ti/纳米TiO2-Pt修饰电极 直接氧化 乙二醛 乙醛酸 |
| 收稿时间： | 2009-01-18 |
| 修稿时间： | 2009-03-09 |
Electrocatalytic Oxidation of Glyoxal on Ti/NanoTiO2-Pt Modified Electrode |
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| 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(7):1434-1438. |
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| Authors: | CHU Dao-Bao HE Jian-Guo HOU Yuan-Yuan XU Mai WANG Shu-Xi WANG Jian ZHA Long-Wu ZHANG Xue-Jiao |
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| Institution: | 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 |
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| Abstract: | 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. |
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| Keywords: | Electrocatalysis Ti/nanoTiO2-Pt modified electrode Direct oxidation Glyoxal Glyoxylic acid |
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