scholarly journals Concentration profile of dissolved gas during hydrogen gas evolution: an optical approach

2020 ◽  
Vol 56 (92) ◽  
pp. 14483-14486
Author(s):  
Kota Ando ◽  
Yoshiharu Uchimoto ◽  
Takashi Nakajima
Keyword(s):  
Concentration Profile ◽  
Hydrogen Gas ◽  
Optical Image ◽  
Gas Evolution ◽  
Dissolved Gas ◽  
Image Tracking ◽  
Dissolved Hydrogen

Optical image tracking of individual bubbles enables us to extract the concentration profile of dissolved hydrogen as a function of distance from the electrode.

scholarly journals Hydrogen Gas Evolution from Water-dispersed Titania and Alumina Nanoparticles by γ-Ray Irradiation

RADIOISOTOPES ◽  
2000 ◽  
Vol 49 (7) ◽  
pp. 354-358 ◽  
Author(s):  
Satoshi SEINO ◽  
Ryosuke FUJIMOTO ◽  
Takao YAMAMOTO ◽  
Masahiro KATSURA ◽  
Shuichi OKUDA ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Hydrogen Gas ◽  
Alumina Nanoparticles ◽  
Gas Evolution ◽  
Gamma Ray Irradiation

Kinetics of Hydrogen Absorption, Desorption And Permeation of Metals

CORROSION ◽  
1958 ◽  
Vol 14 (12) ◽  
pp. 34-38 ◽  
Author(s):  
T. G. OWE BERG
Keyword(s):  
Experimental Data ◽  
Reaction Mechanisms ◽  
Hydrogen Absorption ◽  
Hydrogen Gas ◽  
Acid Solutions ◽  
Dilute Acid ◽  
Energy Diffusion ◽  
Dissolved Hydrogen ◽  
Kinetics Of ◽  
Absorption Of Hydrogen

Abstract The reaction mechanisms for the absorption of hydrogen by metals from moist hydrogen gas and dilute acid solutions, for the desorption from metals of dissolved hydrogen in the presence of water and for hydrogen solubility and permeation under those conditions are discussed. Their kinetics are also given. Formulae are derived for rates and equilibria. These are compared with experimental data. The migration of H atoms in the metal is concluded to be associated with zero or nearly zero activation energy. Diffusion is rapid enough to maintain almost uniform distribution of H atoms in the metal during absorption and desorption under ordinary conditions. 3.8.4

scholarly journals Nitric oxide monooxygenation (NOM) reaction of cobalt-nitrosyl {Co(NO)}8 to CoII-nitrito {CoII(NO2−)}: base induced hydrogen gas (H2) evolution

2020 ◽  
Vol 11 (19) ◽  
pp. 5037-5042 ◽  
Author(s):  
Sandip Das ◽  
Kulbir ◽  
Somnath Ghosh ◽  
Subash Chandra Sahoo ◽  
Pankaj Kumar
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
H2 Evolution

Base-induced hydrogen (H2) gas evolution in the nitric oxide monoxygenation reaction.

Efficient electrocatalytic hydrogen gas evolution by a cobalt–porphyrin-based crystalline polymer

2018 ◽  
Vol 47 (26) ◽  
pp. 8801-8806 ◽  
Author(s):  
Yanyu Wu ◽  
José M. Veleta ◽  
Diya Tang ◽  
Alex D. Price ◽  
Cristian E. Botez ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Aqueous Media ◽  
Crystalline Polymer ◽  
Hydrogen Gas ◽  
Gas Evolution ◽  
Polymeric System ◽  
Cobalt Porphyrin

Herein, we report a crystalline CoTcPP-based [TcPP = the anion of meso-tetra(4-carboxyphenyl)porphyrin] polymeric system, 1, as a hydrogen evolution reaction (HER) electrocatalyst in acidic aqueous media.

Potential Dependence of Hydrogen Embrittlement Susceptibility of Ultra High Strength Low Alloy Steel

2002 ◽  
Author(s):  
Shin-ichi Komazaki ◽  
Rie Maruyama ◽  
Tatsuo Honno ◽  
Toshihei Misawa
Keyword(s):  
Hydrogen Embrittlement ◽  
Alloy Steel ◽  
High Strength ◽  
Hydrogen Gas ◽  
Potential Range ◽  
Gas Evolution ◽  
Adsorbed Hydrogen ◽  
Low Alloy Steel ◽  
Applied Potential ◽  
Potential Region

In order to investigate the susceptibility of the ultra high strength low alloy steel to hydrogen embrittlement, a slow strain rate tensile test was carried out in boric acid-borax buffer aqueous solutions of pH 10 at the potential range from corrosion potential to hydrogen gas evolution potential, including adsorbed hydrogen potential. Experimental results revealed that the susceptibility to hydrogen embrittlement was dependent on the applied potential and increased linearly with increasing applied cathodic potential in the adsorbed hydrogen potential region. On the other hand, in the hydrogen gas evolution potential region, the susceptibility was independent of the applied potential and showed almost no variation. Based on the results obtained, these changes in susceptibility to hydrogen embrittlement with applied potential have been discussed in terms of the variation in reduction behavior of oxide films on the specimen surface.

Hydrogen Gas Evolution from Cathodically Protected Surfaces

CORROSION ◽  
1985 ◽  
Vol 41 (7) ◽  
pp. 389-397 ◽  
Author(s):  
R. N. Parkins ◽  
A. J. Markworth ◽  
J. H. Holbrook ◽  
R. R. Fessler
Keyword(s):  
Hydrogen Gas ◽  
Gas Evolution

Development of oil-dissolved hydrogen gas detector for diagnosis of transformers

1990 ◽  
Vol 5 (1) ◽  
pp. 226-232 ◽  
Author(s):  
Y. Inoue ◽  
K. Suganuma ◽  
M. Kamba ◽  
M. Kikkawa
Keyword(s):  
Hydrogen Gas ◽  
Gas Detector ◽  
Dissolved Hydrogen

An Evaluation of Hydrogen Evolution from Corrosion of Carbon Steel in Low/Intermediate Level Waste Repositories

1994 ◽  
Vol 353 ◽  
Author(s):  
Fumio Matsuda ◽  
Ryutaro Wada ◽  
Kazuo Fujiwara ◽  
Ai Fujiwara
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Hydrogen Evolution ◽  
Hydrogen Gas ◽  
Intermediate Level ◽  
Evolution Rate ◽  
List Type ◽  
Gas Evolution ◽  
Hydrogen Evolution Rate ◽  
Waste Repositories

AbstractAs a sequence of studies to evaluate the quantity of gas evolution from low/intermediate level waste repositories,hydrogen gas evoluted from corrosion of carbon steel in simulated repository environment was evaluated by laboratory experiments. The experimental results on the hydrogen gas evolution both in air purging condition simulated oxidizing environment and nitrogen purging condition simulated reducing environment, are summarized as follows.(1)Hydrogen gas evolution enough to analyze quantitavely by gas chromatography (>5ppm) has been recognized under almost all test conditions except reducing equilibrium cement water.(2)Effects of purging gas (air,nitrogen) on the hydrogen gas evolution and the corrosion rate calculated from weight loss were air purge > nitrogen purge. On the other hand, the contribution ratio of hydrogen evolution reaction in corrosion rate was nitrogen purge > air purge.(3)Effects of test solution on the hydrogen evolution rate were as fo11ows. • Air Purge :Equilibrium Bentonite Water ≈ Equilibrium Cement Water > Synthetic Sea Watert• N2 Purge:Synthetic Sea Water > Equilibrium Bentonite Water >> Equilibrium Cement Water(4)No distinct effect of crevice geometry of test specimen on hydrogen evolution rate was recognized. Only under the reducing equilibrium cement water, however, the increase of hydrogen evolution was confirmed after the immersion of several hundred hours.(5)Hydrogen evolution rates tended to decrease with testing time except in the reducing equilibrium cement water.(6)No distinct difference of hydrogen evolution rate between steels (SPHC, SPCC) was observed.

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