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Title: Multilayer graphane synthesized under high hydrogen pressure

Abstract

A new hydrocarbon – hydrographite – with the composition close to CH is shown to form from graphite and gaseous hydrogen at pressures above 2 GPa and temperatures from 450 to 700 °C. Hydrographite is a black solid thermally stable under ambient conditions. When heated in vacuum, it decomposes into graphite and molecular hydrogen at temperatures from 500 to 650 °C. Powder X-ray diffraction characterizes hydrographite as a multilayer “graphane II” phase predicted by ab initio calculations [Wen X-D et al. PNAS 2011; 108:6833] and consisting of graphane sheets in the chair conformation stacked along the hexagonal c axis in the -ABAB- sequence. The crystal structure of the synthesized phase belongs to the P63mc space group. Moreover, the unit cell parameters are a = 2.53(1) Å and c = 9.54(1) Å and therefore exceed the corresponding parameters of graphite by 2.4(2)% and 42.0(3)%. Stretching vibrations of C–H groups on the surface of the hydrographite particles are examined by infrared spectroscopy.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [3];  [1];  [4];  [1];  [1];  [5]
  1. Inst. of Solid State Physics, Moscow District (Russia)
  2. Moscow State Univ., Moscow (Russian Federation)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Inst. of Problems of Chemical Physics RAS, Moscow District (Russia)
  5. National Univ. of Science and Technology, Moscow (Russia)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1265908
Alternate Identifier(s):
OSTI ID: 1266404
Grant/Contract Number:  
AC05-00OR22725; 11-02-00401
Resource Type:
Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 100; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Antonov, V. E., Bashkin, I. O., Bazhenov, A. V., Bulychev, B. M., Fedotov, V. K., Fursova, T. N., Kolesnikov, A. I., Kulakov, V. I., Lukashev, R. V., Matveev, D. V., Sakharov, M. K., and Shulga, Y. M. Multilayer graphane synthesized under high hydrogen pressure. United States: N. p., 2015. Web. doi:10.1016/j.carbon.2015.12.051.
Antonov, V. E., Bashkin, I. O., Bazhenov, A. V., Bulychev, B. M., Fedotov, V. K., Fursova, T. N., Kolesnikov, A. I., Kulakov, V. I., Lukashev, R. V., Matveev, D. V., Sakharov, M. K., & Shulga, Y. M. Multilayer graphane synthesized under high hydrogen pressure. United States. doi:10.1016/j.carbon.2015.12.051.
Antonov, V. E., Bashkin, I. O., Bazhenov, A. V., Bulychev, B. M., Fedotov, V. K., Fursova, T. N., Kolesnikov, A. I., Kulakov, V. I., Lukashev, R. V., Matveev, D. V., Sakharov, M. K., and Shulga, Y. M. Sat . "Multilayer graphane synthesized under high hydrogen pressure". United States. doi:10.1016/j.carbon.2015.12.051. https://www.osti.gov/servlets/purl/1265908.
@article{osti_1265908,
title = {Multilayer graphane synthesized under high hydrogen pressure},
author = {Antonov, V. E. and Bashkin, I. O. and Bazhenov, A. V. and Bulychev, B. M. and Fedotov, V. K. and Fursova, T. N. and Kolesnikov, A. I. and Kulakov, V. I. and Lukashev, R. V. and Matveev, D. V. and Sakharov, M. K. and Shulga, Y. M.},
abstractNote = {A new hydrocarbon – hydrographite – with the composition close to CH is shown to form from graphite and gaseous hydrogen at pressures above 2 GPa and temperatures from 450 to 700 °C. Hydrographite is a black solid thermally stable under ambient conditions. When heated in vacuum, it decomposes into graphite and molecular hydrogen at temperatures from 500 to 650 °C. Powder X-ray diffraction characterizes hydrographite as a multilayer “graphane II” phase predicted by ab initio calculations [Wen X-D et al. PNAS 2011; 108:6833] and consisting of graphane sheets in the chair conformation stacked along the hexagonal c axis in the -ABAB- sequence. The crystal structure of the synthesized phase belongs to the P63mc space group. Moreover, the unit cell parameters are a = 2.53(1) Å and c = 9.54(1) Å and therefore exceed the corresponding parameters of graphite by 2.4(2)% and 42.0(3)%. Stretching vibrations of C–H groups on the surface of the hydrographite particles are examined by infrared spectroscopy.},
doi = {10.1016/j.carbon.2015.12.051},
journal = {Carbon},
number = C,
volume = 100,
place = {United States},
year = {2015},
month = {12}
}

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