Graphene Electrochemistry: Understanding fundamental electron transfer at graphite electrodes

石墨烯电化学：了解石墨电极上的基本电子转移

• 批准号: EP/I005145/1
• 负责人: Robert Dryfe
• 金额: $ 54.51万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FI005145%2F1
• 关键词: Graphene; Electrochemistry; Understanding; fundamental; electron

Electrochemistry is concerned with the transfer of charge between a solid (the electrode) and a molecule, which is usually in solution. The properties of the electrode itself may be important, particularly in the case of carbon surfaces, which is especially relevant in view of their widespread applications as electrode materials. Graphitic forms of carbon are plentiful, non-toxic and highly conductive, and have thus found uses as disposable electrode materials in electrochemical glucose sensing, or as continually-used substrates in energy storage and generation (e.g. lithium ion batteries, super-capacitors and fuel cells). In each of these roles, the interfacial properties, and particularly the charge transfer kinetics, of the carbon are essential. Such commercial electrochemical applications of carbon have traditionally used screen-printed or activated carbons, formed from micron-scale amorphous or graphitic particles, often mixed with a polymeric binder. There has been enormous interest in the last decade or so in the use of nano-scale carbon materials, both from the viewpoint of fundamental understanding of their properties and their technological exploitation. Carbon nanotubes (CNTs) consist of rolled up 1-dimensional sheets of carbon atoms. Recently 2-dimensional carbon in the form of single graphite sheets, known as graphene, has been isolated. These analogues of graphite have attracted much interest because of their unique electronic properties, not least the exceptionally high carrier mobility, and atomically well-defined structure. These properties have stimulated enormous interest in theoretical and experimental studies of charge TRANSPORT within CNTs and graphene. An equally interesting area, given the myriad of electrochemical applications of carbon (see above) is to understand the case of interfacial charge TRANSFER from the low dimensional carbon to a redox-active molecule. In particular, the structure of mono- and bi-layer graphene provides an ideal model system with which fundamental questions about charge transfer to/from carbons can be answered. The approach we will pursue exploits the lead position held by the UK generally, and Manchester in particular, established by the experimental isolation of high purity graphene by Novoselov et al in 2004 . We will use graphene samples defined by lithographically etched windows to study the interfacial charge transfer characteristics of the material as a function of structure. Experimental work will be supported with state-of-the-art computation.

电化学涉及固体（电极）和分子（通常在溶液中）之间的电荷转移。电极本身的性质可能是重要的，特别是在碳表面的情况下，鉴于其作为电极材料的广泛应用，这是特别相关的。石墨形式的碳是丰富的、无毒的和高导电性的，并且因此已经发现在电化学葡萄糖感测中用作一次性电极材料，或者在能量存储和产生（例如锂离子电池、超级电容器和燃料电池）中用作连续使用的基底。在这些角色中，碳的界面性质，特别是电荷转移动力学是必不可少的。碳的这种商业电化学应用传统上使用丝网印刷或活性碳，其由微米级无定形或石墨颗粒形成，通常与聚合物粘合剂混合。在过去十年左右的时间里，无论是从对其性质的基本理解还是从其技术开发的角度来看，都对纳米级碳材料的使用产生了巨大的兴趣。碳纳米管（CNTs）是由一维碳原子层组成。最近，二维碳以单层石墨片的形式被分离出来，称为石墨烯。这些石墨的类似物由于其独特的电子性质而引起了人们的极大兴趣，尤其是极高的载流子迁移率和原子上明确定义的结构。这些性质激发了人们对碳纳米管和石墨烯内电荷输运的理论和实验研究的极大兴趣。考虑到碳的无数电化学应用（见上文），一个同样有趣的领域是理解从低维碳到氧化还原活性分子的界面电荷转移的情况。特别是，单层和双层石墨烯的结构提供了一个理想的模型系统，可以回答关于电荷转移到/从碳的基本问题。我们将采用的方法利用了英国的领先地位，特别是曼彻斯特，这是由Novoselov等人在2004年通过实验分离高纯度石墨烯而建立的。我们将使用由光刻蚀刻窗口定义的石墨烯样品来研究材料的界面电荷转移特性作为结构的函数。实验工作将得到最先进的计算支持。

项目成果

On the controlled electrochemical preparation of R4N+ graphite intercalation compounds and their host structural deformation effects

• DOI: 10.1016/j.jelechem.2014.07.025
• 发表时间: 2014-09-15
• 期刊: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
• 影响因子: 4.5
• 作者: Cooper, Adam J.;Velicky, Matej;Dryfe, Robert A. W.
• 通讯作者: Dryfe, Robert A. W.

Electrochemical behavior of monolayer and bilayer graphene.

• DOI: 10.1021/nn202878f
• 发表时间: 2011-10
• 期刊: ACS nano
• 影响因子: 17.1
• 作者: A. T. Valota;I. Kinloch;K. Novoselov;C. Casiraghi;A. Eckmann;E. Hill;R. Dryfe

Exfoliation of natural van der Waals heterostructures to a single unit cell thickness.

• DOI: 10.1038/ncomms14410
• 发表时间: 2017-02-13
• 期刊: Nature communications
• 影响因子: 16.6
• 作者: Velický M;Toth PS;Rakowski AM;Rooney AP;Kozikov A;Woods CR;Mishchenko A;Fumagalli L;Yin J;Zólyomi V;Georgiou T;Haigh SJ;Novoselov KS;Dryfe RA
• 通讯作者: Dryfe RA

Electrochemical investigation of chemical vapour deposition monolayer and bilayer graphene on the microscale

微尺度化学气相沉积单层和双层石墨烯的电化学研究

• DOI: 10.1016/j.electacta.2013.03.187
• 发表时间: 2013
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: Valota A

Electrochemistry of well-defined graphene samples: role of contaminants.

• DOI: 10.1039/c4fd00064a
• 发表时间: 2014-11
• 期刊: Faraday discussions
• 影响因子: 3.4
• 作者: Hollie V. Patten;Matěj Velický;Nick Clark;C. Muryn;I. Kinloch;R. Dryfe