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首页> 外文期刊>Journal of power sources >Nanostructured F doped IrO_2 electro-catalyst powders for PEM based water electrolysis
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Nanostructured F doped IrO_2 electro-catalyst powders for PEM based water electrolysis

机译:纳米结构的F掺杂的IrO_2电催化剂粉末,用于基于PEM的水电解

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摘要

Fluorine doped iridium oxide (IrO_2:F) powders with varying F content ranging from 0 to 20 wt% has been synthesized by using a modification of the Adams fusion method. The precursors (IrCl_4 and NH_4F) are mixed with NaNO_3 and heated to elevated temperatures to form high surface area nanomaterials as electro-catalysts for PEM based water electrolysis. The catalysts were then coated on a porous Ti substrate and have been studied for the oxygen evolution reaction in PEM based water electrolysis. The IrO_2:F with an optimum composition of IrO_2:10 wt.% F shows remarkably superior electrochemical activity and chemical stability compared to pure IrO_2. The results have also been supported via kinetic studies by conducting rotating disk electrode (RDE) experiments. The RDE studies confirm that the electro-catalysts follow the two electron transfer reaction for electrolysis with calculated activation energy of ~25 kJ mol~(-1). Single full cell tests conducted also validate the superior electrochemical activity of the 10 wt.% F doped IrO_2.
机译:通过使用Adams熔融方法的改进方法,合成了F含量在0至20 wt%之间的掺氟氧化铱(IrO_2:F)粉末。将前体(IrCl_4和NH_4F)与NaNO_3混合并加热至高温,以形成高表面积的纳米材料,用作基于PEM的水电解的电催化剂。然后将催化剂涂覆在多孔Ti基底上,并已针对基于PEM的水电解中的氧释放反应进行了研究。与纯IrO_2相比,具有最佳IrO_2:10 wt。%F组成的IrO_2:F显示出显着优异的电化学活性和化学稳定性。通过进行旋转圆盘电极(RDE)实验进行的动力学研究也支持了该结果。 RDE研究证实,电催化剂遵循两个电子转移反应进行电解,计算出的活化能约为25 kJ mol〜(-1)。进行的单个全电池测试还验证了10 wt。%F掺杂的IrO_2的优异电化学活性。

著录项

  • 来源
    《Journal of power sources》 |2014年第10期|855-865|共11页
  • 作者单位

    Department of Chemical and Petroleum Engineering Swanson School of Engineering, University of Pittsburgh, PA 15261, USA;

    Department of Chemical and Petroleum Engineering Swanson School of Engineering, University of Pittsburgh, PA 15261, USA;

    Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA,Center for Complex Engineered Multifunctional Materials, University of Pittsburgh, PA 15261, USA;

    Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA,Center for Complex Engineered Multifunctional Materials, University of Pittsburgh, PA 15261, USA;

    Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA;

    Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA;

    Department of Mechanical Engineering and Materials Science, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA;

    Department of Chemical and Petroleum Engineering Swanson School of Engineering, University of Pittsburgh, PA 15261, USA,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA,Center for Complex Engineered Multifunctional Materials, University of Pittsburgh, PA 15261, USA,Department of Mechanical Engineering and Materials Science, Swanson School of Engineering, University of Pittsburgh, PA 15261, USA,Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, PA 15217, USA,Department of Bioengineering, 815C Benedum Hall, 3700 O'Hara Street, Pittsburgh, PA 15261, USA;

  • 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

    PEM water electrolysis; F doped IrO_2; Nanostructured; High surface area; Electro-catalyst;

    机译:PEM水电解;F掺杂的IrO_2;纳米结构;高表面积电催化剂;

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