Multilayer graphane synthesized under high hydrogen pressure

V. E. Antonov; I. O. Bashkin; A. V. Bazhenov; B. M. Bulychev; V. K. Fedotov; T. N. Fursova; A. I. Kolesnikov; V. I. Kulakov; R. V. Lukashev; D. V. Matveev; M. K. Sakharov; Y. M. Shulga

doi:10.1016/j.carbon.2015.12.051

Multilayer graphane synthesized under high hydrogen pressure

V. E. Antonov, I. O. Bashkin, A. V. Bazhenov, B. M. Bulychev, V. K. Fedotov, T. N. Fursova, A. I. Kolesnikov, V. I. Kulakov, R. V. Lukashev, D. V. Matveev, M. K. Sakharov, Y. M. Shulga

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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. If 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. 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.

Original language	English
Pages (from-to)	465-473
Number of pages	9
Journal	Carbon
Volume	100
DOIs	https://doi.org/10.1016/j.carbon.2015.12.051
State	Published - Apr 1 2016

Funding

The work was supported by Grant No. 11-02-00401 from the Russian Foundation for Basic Research and by the Program “The Matter under High Pressure” of the Russian Academy of Sciences . A.I.K. greatly acknowledges the support from the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy .

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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. If 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. The unit cell parameters are a = 2.53(1) {\AA} and c = 9.54(1) {\AA} 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.",

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.}",

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doi = "10.1016/j.carbon.2015.12.051",

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T1 - Multilayer graphane synthesized under high hydrogen pressure

AU - Antonov, V. E.

AU - Bashkin, I. O.

AU - Bazhenov, A. V.

AU - Bulychev, B. M.

AU - Fedotov, V. K.

AU - Fursova, T. N.

AU - Kolesnikov, A. I.

AU - Kulakov, V. I.

AU - Lukashev, R. V.

AU - Matveev, D. V.

AU - Sakharov, M. K.

AU - Shulga, Y. M.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - 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. If 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. 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.

AB - 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. If 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. 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.

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DO - 10.1016/j.carbon.2015.12.051

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SN - 0008-6223

VL - 100

SP - 465

EP - 473

JO - Carbon

JF - Carbon

ER -

Multilayer graphane synthesized under high hydrogen pressure

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