中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (12): 1415-1420.DOI: 10.3724/SP.J.1095.2011.00697

• 研究论文 • 上一篇    下一篇

甲醇在不同结构氧化钨-Pt/C催化剂上的电催化氧化行为

闫鹏1,2,徐英明1,赵辉1*,霍丽华1,高山1   

  1. (1.黑龙江大学化学化工与材料学院，功能材料省高校重点实验室 哈尔滨 150080;
    2.黑龙江工程学院材料与化学工程系 哈尔滨)
  • 收稿日期:2010-11-24 修回日期:2011-05-18 出版日期:2011-12-10 发布日期:2011-12-10
  • 通讯作者: 赵辉，教授; Tel:0451-86608040; Fax:0451-86608426; E-mail:zhaohui98@yahoo.com; 研究方向：固体电化学
  • 基金资助:
    黑龙江省杰出青年基金黑龙江省教育厅 (11551337) 哈尔滨市青年基金(2011RFQXG011)资助项目

Compared Study of Catalytic Activity for Methanol Oxidation on Different Pt-WO3/C Electrodes

YAN Peng1,2, XU Yingming1, ZHAO Hui1*, HUO Lihua1, GAO Shan1   

  1. (1.Laboratory of Functional Materials,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080;
    2.Department of Materials Science and Chemistry,Heilongjiang Institute of Technology,Harbin)
  • Received:2010-11-24 Revised:2011-05-18 Published:2011-12-10 Online:2011-12-10

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1540

被引次数

1

摘要：

采用水热法合成2种氧化钨（WO3）纳米材料，并利用XRD和电子探针显微分析仪（EPMA）进行了表征。 利用循环伏安法研究了Pt-WO3/C电极对甲醇氧化的电催化活性。 结果表明,Pt-WO3/C催化剂对甲醇氧化的电催化活性优于Pt/C催化剂，且氧化钨质量分数为20%的Pt-氧化钨/C催化效果最好。 与青铜相氧化钨掺杂的Pt/C电极比较，掺杂焦绿石型氧化钨的Pt/C电极催化性能有很大提高，这是由于焦绿石型氧化钨表面具有较多OHads。 质量分数20%的Pt-焦绿石型氧化钨/C在0.5 mol/L CH3OH+1 mol/L H2SO4溶液中对甲醇氧化的峰电流密度达到87.2×10-3 A/cm2。

关键词: 甲醇, 燃料电池, Pt- WO3/C催化剂

Abstract:

Tungsten oxide-based nano-materials with two different crystal structures were prepared by hydrothermal method and characterized by X-ray diffraction(XRD) and electron probe micro analyzer(EPMA), respectively. The electrocatalytic activity for methanol oxidation on Pt-WO3/C electrode was studied by cyclic voltammetry. The results indicate that the electrocatalytic activity of Pt-WO3/C is much higher than that of Pt/C catalyst. For various amount of WO3, the catalyst with 20% mass fraction of WO3 has the best electrocatalytic activity. The electrocatalytic activity of the pyrochlore type tungsten oxide doped Pt/C electrode is higher than that of the tungsten bronze doped electrode, which is likely due to the strong attractions of OHads on the surface of pyrochlore type tungsten oxide. The current density of the pyrochlore type tungsten oxide doped Pt/C electrode for electro-oxidation of methanol is 87.2×10-3 A/cm2 in 0.5 mol/L CH3OH+1 mol/L H2SO4 solution.

Key words: methanol, fuel cell, Pt- tungsten oxide/C catalyst

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