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首页> 外文期刊>Chemistry: A European journal >Precise tuning of surface composition and electron-transfer properties of graphene oxide films through electroreduction
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Precise tuning of surface composition and electron-transfer properties of graphene oxide films through electroreduction

机译：通过电还原精确调节氧化石墨烯膜的表面组成和电子传输性能

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摘要

Graphene materials are generally prepared from the exfoliation of graphite oxide (GO) to graphene oxide, followed by subsequent chemical or thermal reduction. These methods, although efficient in removing most of the oxygen functionalities from the GO material, lack control over the extent of the reduction process. We demonstrate here an electrochemical reduction procedure that not only allows for precise control of the reduction process to obtain a graphene material with a well-defined C/O ratio in the range of 3 to 10, but also one that is able to tune the electrocatalytic properties of the reduced material. A method that is able to precisely control the amount and density of the oxygen functionalities on the graphene material as well as its electrochemical behaviour is very important for several applications such as electronics, bio-composites and electrochemical devices. Film studies: Electrochemical reduction allows for precise tuning of the surface composition of graphene oxide films by altering the content of the oxygen functionalities (see figure). The electrochemical activity of graphene oxide modified electrodes can therefore be adjusted to specific levels according to the desired application.
机译：石墨烯材料通常是通过将氧化石墨（GO）剥离到氧化石墨烯，然后进行化学还原或热还原而制备的。这些方法尽管能有效地从GO材料中除去大部分的氧官能团，但缺乏对还原过程范围的控制。我们在这里展示了一种电化学还原程序，该程序不仅可以精确控制还原过程，以获得具有明确定义的C / O比在3至10范围内的石墨烯材料，而且还可以调节电催化性能。还原材料的性能。能够精确控制石墨烯材料上的氧官能团的数量和密度及其电化学行为的方法对于电子，生物复合材料和电化学装置等多种应用非常重要。膜研究：电化学还原可通过改变氧官能度的含量来精确调节氧化石墨烯膜的表面组成（见图）。因此，可以根据所需应用将氧化石墨烯修饰的电极的电化学活性调节至特定水平。

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