On characteristics and physics of processes of thermal desorption of deuterium from isotropic graphite at 700–1700 K

Nechaev, Yu. S.; Alexandrova, N. M.; Shurygina, N. A.; Черетаева, А. О.; Kostikova, E. K.; Öchsner, Andreas

doi:10.1016/j.jnucmat.2020.152162

Cited by 12 publications

(15 citation statements)

References 18 publications

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“…From the above shown Equations ( 1) and (2), it follows that the Q* quantity can be also determined by the Kissinger method (i.e., from the linear dependence of ln(T max 2 /β) versus 1/T max ), relevant for first-order desorption processes. However, as shown in [4,19,20], this is valid only in the absence of close neighboring thermal desorption peaks (near the considered one).…”

Section: Methodology and Materialsmentioning

confidence: 91%

“…Further development of the methodology [16][17][18][19][20][21] for "processing" and detailed analysis of hydrogen thermal desorption spectra for carbon materials and nanomaterials, for cases of one single heating rate, has been completed and used in the present study in relation to experimental data [7][8][9][10][11][12] for graphite subjected to irradiation with atomic hydrogen. The developed technique [20] is not less informative, but much less time-consuming in experimental terms compared to the generally accepted Kissinger method [13][14][15], which demands the use of several heating rates, and has strict limits of applicability [4,19,20].…”

Section: Methodology and Materialsmentioning

confidence: 99%

“…[20]; (2) The results of studying the characteristics and physics of processes of thermal desorption of deuterium from isotropic graphite at 700-1700 K, see Ref. [19]; (3) The results of the kinetic analysis of the hydrogen thermal desorption spectra for graphite and advanced carbon nanomaterials, see Ref. [18].…”

Section: Methodology and Materialsmentioning

confidence: 99%

“…Firstly, a further development of the methodology [16][17][18][19][20][21] and its applications, relevant to TDS data [7][8][9][10][11][12], will be performed. The characteristics and atomic mechanisms of processes of thermal desorption of hydrogen from such materials [7][8][9][10][11][12] will be determined and analyzed, on the basis of using the results, methods and approaches given in .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Revealing Hydrogen States in Carbon Structures by Analyzing the Thermal Desorption Spectra

Nechaev

Denisov

Shurygina

et al. 2022

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An effective methodology for the detailed analysis of thermal desorption spectra (TDS) of hydrogen in carbon structures at micro- and nanoscale was further developed and applied for a number of TDS data of one heating rate, in particular, for graphite materials irradiated with atomic hydrogen. The technique is based on a preliminary description of hydrogen desorption spectra by symmetric Gaussians with their special processing in the approximation of the first- and the second-order reactions. As a result, the activation energies and the pre-exponential factors of the rate constants of the hydrogen desorption processes are determined, analyzed and interpreted. Some final verification of the results was completed using methods of numerical simulation of thermal desorption peaks (non-Gaussians) corresponding to the first- and the second-order reactions. The main research finding of this work is a further refinement and/or disclosure of poorly studied characteristics and physics of various states of hydrogen in microscale graphite structures after irradiation with atomic hydrogen, and comparison with the related results for nanoscale carbon structures. This is important for understanding the behavior and relationship of hydrogen in a number of cases of high energy carbon-based materials and nanomaterials.

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Section: Methodology and Materialsmentioning

confidence: 91%

Section: Methodology and Materialsmentioning

confidence: 99%

Section: Methodology and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Revealing Hydrogen States in Carbon Structures by Analyzing the Thermal Desorption Spectra

Nechaev

Denisov

Shurygina

et al. 2022

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“…Настоящая работа содержит результаты применительно к экспериментальным данным и теоретическим положениям в работах [2,22]. Более подробный анализ экспериментальных данных по углеродным наноструктурам и графиту проведен в [23].…”

Section: Introductionunclassified

Пики Термодесорбции Водорода: Моделирование И Интерпретация

Заика¹,

Костикова²,

Нечаев³

2021

Журнал Технической Физики

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Various models of hydrogen thermal desorption peaks are analyzed. The dynamics model of the volume-averaged concentration with a continuum parameter allows integrally taking into account the degree of dominance of the limiting factors (diffusion and recombination of atoms into molecules during desorption). An analytical criterion for peaks symmetry is proposed in the context of comparison with the method of decomposing the component spectrum into the sum of Gaussian. Modifications of the Kissinger method for estimating the activation energy of desorption in experiments with several heating rates and procedures for solving the inverse problem of parametric identification of a unimodal peak using only one heating rate are presented. A comparative with a diffusion model with dynamic boundary conditions is performed. It is shown that the cause of local peaks can be not only capture with different binding energies but also the dynamics of interaction of bulk and surface processes, change in the surface structure during heating.

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Studying the thermal desorption of hydrogen in some carbon nanostructures and graphite

Nechaev

Alexandrova

Черетаева

et al. 2020

International Journal of Hydrogen Energy

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On characteristics and physics of processes of thermal desorption of deuterium from isotropic graphite at 700–1700 K

Cited by 12 publications

References 18 publications

Revealing Hydrogen States in Carbon Structures by Analyzing the Thermal Desorption Spectra

Revealing Hydrogen States in Carbon Structures by Analyzing the Thermal Desorption Spectra

Пики Термодесорбции Водорода: Моделирование И Интерпретация

Studying the thermal desorption of hydrogen in some carbon nanostructures and graphite

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