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首页> 外文期刊>ChemPlusChem >Redox-mediated synthesis of functionalised graphene: A strategy towards 2d multifunctional electrocatalysts for energy conversion applications
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Redox-mediated synthesis of functionalised graphene: A strategy towards 2d multifunctional electrocatalysts for energy conversion applications

机译：氧化还原介导的官能化石墨烯的合成：对能量转换应用的2D多功能电催化剂的策略

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摘要

A simple, one-step synthetic route for developing a two-dimensional multifunctional electrocatalyst is reported, by the functionalisation of graphene using oxidised ethylenedioxythiophene (O-EDOT). The mutually assisted redox reaction between graphene oxide (GO) and EDOT facilitates the reduction of GO to graphene with a concomitant deposition of O-EDOT on the surface of the graphene. The oxidised surface of GO catalyses the reaction without using an added reducing agent, so a controlled and uniform deposition of O-EDOT is ensured on the surface of graphene, which essentially prevents the restacking of the layers. UV/Visible, IR, Raman and X-ray photoelectron spectroscopy give valid evidence for the reduction and functionalisation of graphene sheets. The functional groups present on the surface of graphene are found to tune the physical and chemical properties of graphene. Consequently, the functionalised material displays enhanced electrocatalytic activity for the reduction of oxygen to water and I3- to I- relative to pristine graphene. These distinct property characteristics make the material a versatile cathode electrocatalyst for both alkaline anion-exchange membrane fuel cells and dye-sensitised solar cells. Alternative energy: One-pot reduction and functionalization of graphene oxide with ethylenedioxythiophene (EDOT) provides a multifunctional material (GEDOT) possessing catalytic sites for two distinct electrochemical reactions: the reduction of oxygen and reduction of triiodide to iodide (see figure). These processes occur in fuel cells and solar cells, respectively.
机译：通过使用氧化亚乙二氧噻吩（O-Edot）的石墨烯的功能化，报道了一种简单的一步式合成途径，用于开发二维多功能电催化剂。氧化烯氧化物（GO）和EDOT之间的相互辅助的氧化还原反应有助于将转至石墨烯的还原在石墨烯表面上的伴随邻沉积。 Go催化的氧化表面在不使用添加的还原剂的情况下催化反应，因此在石墨烯表面上确保了O形映射的控制和均匀沉积，其基本上防止了层的重新包装。 UV /可见，IR，拉曼和X射线光电子能谱给出了石墨烯片的减少和官能化的有效证据。发现石墨烯表面上存在的官能团调节石墨烯的物理和化学性质。因此，官能化材料显示出增强的电催化活性，以减少氧气和I3-相对于原始石墨烯。这些明显的性能特征使材料成为碱性阴离子交换膜燃料电池和染料敏化太阳能电池的多功能阴极电催化剂。替代能量：用乙二氧基噻吩（EDOT）的石墨烯氧化物的单罐还原和官能化提供具有两个不同电化学反应的催化位点的多功能材料（GEDOT）：氧气的还原和将三碘化物还原到碘化物（见图）。这些过程分别发生在燃料电池和太阳能电池中。

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  • 来源
    《ChemPlusChem》 |2013年第10期|共8页
  • 作者

    UnniS.M.; BhangeS.N.; AnothumakkoolB.; KurungotS.;

  • 作者单位

    Physical and Materials Chemistry Division National Chemical Laboratory Pashan Road Pune 411008;

    Physical and Materials Chemistry Division National Chemical Laboratory Pashan Road Pune 411008;

    Physical and Materials Chemistry Division National Chemical Laboratory Pashan Road Pune 411008;

    Physical and Materials Chemistry Division National Chemical Laboratory Pashan Road Pune 411008;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    electrocatalysts; fuel cells; graphene; redox chemistry; solar cells;

    机译：电催化剂;燃料电池;石墨烯;氧化还原化学;太阳能电池;

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