• 文献标题:   Nitrogen species in few-layer graphene produced by thermal exfoliation of fluorinated graphite intercalation compounds
  • 文献类型:   Article
  • 作  者:   OKOTRUB AV, FEDOROVSKAYA EO, SENKOVSKIY BV, BULUSHEVA LG
  • 作者关键词:   exfoliation, fluorinated graphite, intercalation, nexafs, xps
  • 出版物名称:   PHYSICA STATUS SOLIDI BBASIC SOLID STATE PHYSICS
  • ISSN:   0370-1972 EI 1521-3951
  • 通讯作者地址:   SB RAS
  • 被引频次:   4
  • DOI:   10.1002/pssb.201552299
  • 出版年:   2015

▎ 摘  要

Few-layer graphene materials have been produced by decomposition of fluorinated graphite intercalated with acetonitrile (CH3CN) or isopropylamine ((CH3)(2)CHNH2) in the conditions of thermal shock. Electronic structure of the samples before and after exfoliation was studied using nearedge X-ray absorption fine structure and X-ray photoelectron spectroscopy. Analysis of the spectroscopic data revealed the same set of nitrogen species in both exfoliation products that indicates decomposition of the intercalated molecules to the atomic state. Most of the nitrogen atoms were incorporated at the edges of graphene layers in pyridinic and protonated nitrogen forms. A difference in the electrochemical performance of the graphene materials was related with the exfoliation degree and the defect density in the graphene layers. [GRAPHICS] (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim