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首页> 外文期刊>Journal of power sources >Effect of pH value on H_2Ti_2O_5/TiO_2 composite nanotubes as Pt catalyst support for methanol oxidation
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Effect of pH value on H_2Ti_2O_5/TiO_2 composite nanotubes as Pt catalyst support for methanol oxidation

机译:pH值对Pt催化剂H_2Ti_2O_5 / TiO_2复合纳米管甲醇氧化的影响

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摘要

Hydrogenotitanate/titania composite nanotubes (HTNTs) are synthesized from anatase titania power via hydrothermal process at various pH values of acid treatment. The change of HTNTs components is investigated in detail by X-ray diffraction (XRD), energy dispersive analysis of X-ray (EDAX), which reveal that the products are gradually converted from "H_2Ti_2O_5·H_2O" phase to "anatase TiO_2" phase with the decrease of pH values. Pt based catalysts are prepared by microwave-assisted ethylene glycol method. The effects of pH values on the performance of Pt/C-HTNTs catalysts have been mainly investigated. It has been found that the distribution and electrocatalytic properties of platinum nanoparticles are sensitive to the pH value of acid treatment. The Pt/C-HTNTs catalyst prepared at the acid treatment pH value of 7 exhibits the better electrochemical activity and stability than other catalysts.
机译:氢钛酸/二氧化钛复合纳米管(HTNTs)是由锐钛矿型二氧化钛通过水热工艺在各种pH值的酸处理条件下合成得到的。通过X射线衍射(XRD),X射线能量色散分析(EDAX)详细研究了HTNTs组分的变化,发现产物逐渐从“ H_2Ti_2O_5·H_2O”相转变为“锐钛型TiO_2”相。随着pH值的降低。铂基催化剂是通过微波辅助乙二醇法制备的。主要研究了pH值对Pt / C-HTNTs催化剂性能的影响。已经发现铂纳米颗粒的分布和电催化性质对酸处理的pH值敏感。在酸处理pH值为7时制备的Pt / C-HTNTs催化剂比其他催化剂表现出更好的电化学活性和稳定性。

著录项

  • 来源
    《Journal of power sources》 |2014年第25期|196-202|共7页
  • 作者单位

    School of Chemical Engineering and Technology, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China, School of Science, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

    School of Chemical Engineering and Technology, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

    School of Chemical Engineering and Technology, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China, School of Science, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

    School of Chemical Engineering and Technology, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

    School of Chemical Engineering and Technology, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

    School of Science, Harbin Institute of Technology, No.92 West-Da Zhi Street, Harbin 150001, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    H_2Ti_2O_5/TiO_2 composite nanotubes; pH value; Platinum catalyst; Methanol electrooxidation; Direct methanol fuel cell;

    机译:H_2Ti_2O_5 / TiO_2复合纳米管;酸碱值;铂催化剂;甲醇电氧化;直接甲醇燃料电池;

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