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Structural Studies of Hydrographenes
Accounts of Chemical Research ( IF 18.3 ) Pub Date : 2017-05-09 00:00:00 , DOI: 10.1021/acs.accounts.6b00588
Elena Vishnyakova 1 , Gaowei Chen 1 , Bruce E. Brinson 1 , Lawrence B. Alemany 1, 2 , W. Edward Billups 1
Affiliation  

As a result of the unique physical and electrical properties, graphene continues to attract the interest of a large segment of the scientific community. Since graphene does not occur naturally, the ability to exfoliate and isolate individual layers of graphene from graphite is an important and challenging process. The interlayer cohesive energy of graphite that results from van der Waals attractions has been determined experimentally to be 61 meV per carbon atom (61 meV/C atom). This requires the development of a method to overcome the strong attractive forces associated with graphite. The exfoliation process that we, and others, have investigated involves electron transfer into bulk graphite from intercalated lithium to yield lithium graphenide. The resulting graphenide can be reacted with various reagents to yield functionalized graphene. As a part of our interest in the functionalization of graphene, we have explored the Birch reduction as a route to hydrographenes. The addition of hydrogen transforms graphene into an insulator, leading to the prediction that important applications will emerge. This Account focuses mainly on the characterization of the hydrographenes that are obtained from different types of graphite including synthetic graphite powder, natural flake graphite, and annealed graphite powder.

中文翻译:

石墨烯的结构研究

由于其独特的物理和电学性质,石墨烯继续吸引了科学界很大一部分的兴趣。由于石墨烯不是天然存在的,因此剥落石墨烯和从石墨中分离出单个石墨烯层的能力是重要且具有挑战性的过程。由范德华引力产生的石墨层间内聚能已通过实验确定为每个碳原子61 meV(61 meV / C原子)。这就需要开发一种方法来克服与石墨有关的强吸引力。我们和其他人研究的剥落过程涉及电子从嵌入的锂转移到块状石墨中以生成石墨烯化锂。所得的石墨烯可以与各种试剂反应以产生官能化的石墨烯。作为我们对石墨烯功能化的兴趣的一部分,我们探索了Birch还原作为氢石墨烯的途径。氢的添加将石墨烯转变成绝缘体,从而导致人们预测重要的应用将会出现。该内容主要侧重于从不同类型的石墨(包括合成石墨粉,天然片状石墨和退火石墨粉)中获得的水石墨烯的表征。
更新日期:2017-05-09
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