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首页> 外文期刊>Journal of power sources >Electro-oxidation of BH4' in dimethylsulfoxide and dimethylformamide studied by rotating disk electrode voltammetry
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Electro-oxidation of BH4' in dimethylsulfoxide and dimethylformamide studied by rotating disk electrode voltammetry

机译：旋转圆盘电极伏安法研究BH4“在二甲基亚砜和二甲基甲酰胺中的电氧化

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摘要

Borohydride (BH_4~-) is a promising new fuel for fuel cells, yet its practical implementation has been hindered by a deleterious hydrolysis reaction to form H_2 in aqueous solvents, especially at the high BH_4~ concentrations necessary for high-power fuel cells. We investigated a wide array of nonaqueous solvents for their ability to hold BH_4- at higher concentrations and allow effective electro-oxidation at Pt and Au, two well-studied BH_4- anode materials. Only dimethylsulfoxide and dimethylformamide were found to be suitable, and precluded BH_4- decomposition to H_2 in bulk solution (hydrolytic or otherwise). BH_4 decomposition at electrode surfaces was still observed, however. Current densities in these solvents were about an order of magnitude below those observed in aqueous solution, and onset potentials were 0.7 V less favorable. MeOH addition, to stabilize oxidized states of boron, did not increase current.
机译：硼氢化物（BH_4〜-）是一种有前途的燃料电池新燃料，但是其有害的水解反应在水性溶剂中形成H_2，特别是在高功率燃料电池所需的高BH_4〜浓度下，阻碍了其实际应用。我们研究了各种各样的非水溶剂，因为它们能够将BH_4-保持在较高的浓度，并能够在两种研究良好的BH_4-阳极材料Pt和Au上进行有效的电氧化。发现仅二甲基亚砜和二甲基甲酰胺是合适的，并且排除了BH_4-在本体溶液（水解或其他方式）中分解为H_2。但是，仍然观察到电极表面的BH_4分解。这些溶剂中的电流密度比在水溶液中观察到的电流密度低约一个数量级，起始电势低0.7V。添加MeOH以稳定硼的氧化态并没有增加电流。

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  • 来源
    《Journal of power sources》 |2011年第15期|p.6223-6227|共5页
  • 作者

    David A. Finkelstein; David J. Jones; Kenneth Hernandez-Burgos; Hector D. Abruna;

  • 作者单位

    Department of Chemistry and Chemical Biology. Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, United States;

    Department of Chemistry and Chemical Biology. Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, United States;

    Department of Chemistry and Chemical Biology. Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, United States;

    Department of Chemistry and Chemical Biology. Baker Laboratory, Cornell University, Ithaca, NY 14853-1301, United States;

  • 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

    borohydride; hydrolysis; nonaqueous solvent; dimethylsulfoxide; dimethylformamide;

    机译：硼氢化物水解;非水溶剂二甲基亚砜;二甲基甲酰胺;

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