Atomic hydrogen solubility in thin gold films and its influence on hydrogen thermal desorption spectra from the surface

1992 ◽  
Vol 62 (1-2) ◽  
pp. 77-82 ◽  
Author(s):  
L. Stobiński ◽  
R. Duś
Keyword(s):  
Thermal Desorption ◽  
Atomic Hydrogen ◽  
Hydrogen Solubility ◽  
Gold Films

scholarly journals Investigation of the Pressure Dependent Hydrogen Solubility in a Martensitic Stainless Steel Using a Thermal Agile Tubular Autoclave and Thermal Desorption Spectroscopy

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 231
Author(s):  
Patrick Fayek ◽  
Sebastian Esser ◽  
Vanessa Quiroz ◽  
Chong Dae Kim
Keyword(s):  
Stainless Steel ◽  
Thermal Desorption ◽  
Hydrogen Diffusion ◽  
Martensitic Stainless Steel ◽  
Thermal Desorption Spectroscopy ◽  
Hydrogen Uptake ◽  
Hydrogen Solubility ◽  
Automotive Components ◽  
Set Up ◽  
Service Application

Hydrogen is nowadays in focus as an energy carrier that is locally emission free. Especially in combination with fuel-cells, hydrogen offers the possibility of a CO2 neutral mobility, provided that the hydrogen is produced with renewable energy. Structural parts of automotive components are often made of steel, but unfortunately they may show degradation of the mechanical properties when in contact with hydrogen. Under certain service conditions, hydrogen uptake into the applied material can occur. To ensure a safe operation of automotive components, it is therefore necessary to investigate the time, temperature and pressure dependent hydrogen uptake of certain steels, e.g., to deduct suitable testing concepts that also consider a long term service application. To investigate the material dependent hydrogen uptake, a tubular autoclave was set-up. The underlying paper describes the set-up of this autoclave that can be pressurised up to 20 MPa at room temperature and can be heated up to a temperature of 250 °C, due to an externally applied heating sleeve. The second focus of the paper is the investigation of the pressure dependent hydrogen solubility of the martensitic stainless steel 1.4418. The autoclave offers a very fast insertion and exertion of samples and therefore has significant advantages compared to commonly larger autoclaves. Results of hydrogen charging experiments are presented, that were conducted on the Nickel-martensitic stainless steel 1.4418. Cylindrical samples 3 mm in diameter and 10 mm in length were hydrogen charged within the autoclave and subsequently measured using thermal desorption spectroscopy (TDS). The results show how hydrogen sorption curves can be effectively collected to investigate its dependence on time, temperature and hydrogen pressure, thus enabling, e.g., the deduction of hydrogen diffusion coefficients and hydrogen pre-charging concepts for material testing.

Interaction of oxygen with lithium-gold and cesium-gold films: a photoemission and thermal desorption study

1993 ◽  
Vol 97 (18) ◽  
pp. 4737-4744 ◽  
Author(s):  
J. A. Rodriguez ◽  
J. Hrbek ◽  
M. Kuhn ◽  
T. K. Sham
Keyword(s):  
Thermal Desorption ◽  
Gold Films ◽  
Desorption Study

Hydrogen--Halogen Exchange Reactions on Silicon (100)

1990 ◽  
Vol 204 ◽  
Author(s):  
R.E. Thomas ◽  
R.A. Rudder ◽  
R.J. Markunas
Keyword(s):  
Thermal Desorption ◽  
Atomic Hydrogen ◽  
Reverse Reaction ◽  
Thermal Mass ◽  
Exchange Reactions ◽  
Halogen Exchange ◽  
Reverse Sequence

ABSTRACTUsing thermal mass desorption and LEED we have studied interactions of H, C12, and F2 with a silicon (100) surface, and exchange reactions of the gases with adsorbates on the silicon (100) surface. Thermal desorption spectra were measured for surfaces dosed with H, C12, and F2 singly and then for surfaces dosed first with a halogen and then atomic hydrogen. Finally, the reverse sequence was studied, with atomic hydrogen dosing and then the halogen exposure. Results indicate that the molecular halogens C12 and F2 are not effective at removing H from a Si (100) surface. However, for the reverse reaction, atomic hydrogen appears quite effective at removing the halogens.

ADSORPTION DYNAMICS OFCO2ON HYDROGEN PRECOVEREDZn-ZnO(0001): A MOLECULAR BEAM STUDY

2004 ◽  
Vol 11 (06) ◽  
pp. 521-529 ◽  
Author(s):  
J. WANG ◽  
U. BURGHAUS
Keyword(s):  
Monte Carlo ◽  
Binding Energy ◽  
Thermal Desorption ◽  
Impact Energy ◽  
Atomic Hydrogen ◽  
Molecular Beam ◽  
Thermal Desorption Spectroscopy ◽  
Adsorption Dynamics ◽  
Site Blocking ◽  
The Impact

Presented are initial, S0, and coverage, Θ, dependent, S(Θ), adsorption probability measurements, respectively, of CO2adsorption on a hydrogen precovered, polar, Zn -terminated surface of ZnO , parametric in the impact energy, Ei, and atomic hydrogen precoverage, ΘH. Furthermore, CO2Thermal Desorption Spectroscopy has been used to estimate ΘHas well as the binding energy of CO2on H / Zn - ZnO . The S(Θ) curves are below Ei=0.56 eV , consistent with precursor-mediated adsorption (S~ const ), and above that impact energy with adsorbate-assisted adsorption (S increases with Θ). Although a decrease in the CO2binding energy from 32.5 to 28.8 kJ/mol with ΘHis present, S(Θ, ΘH) curves are consistent with a physical site blocking, as demonstrated by Monte Carlo Simulations.

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

2022 ◽  
Vol 8 (1) ◽  
pp. 6
Author(s):  
Yury S. Nechaev ◽  
Evgeny A. Denisov ◽  
Nadezhda A. Shurygina ◽  
Alisa O. Cheretaeva ◽  
Ekaterina K. Kostikova ◽  
...  
Keyword(s):  
Thermal Desorption ◽  
Atomic Hydrogen ◽  
Hydrogen Desorption ◽  
High Energy ◽  
Second Order ◽  
Main Research ◽  
Carbon Structures ◽  
Exponential Factors ◽  
Relationship Of ◽  
Preliminary Description

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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