scholarly journals Effects of bubbles on the electrochemical behavior of hydrogen-evolving Si microwire arrays oriented against gravity

2020 ◽  
Vol 13 (6) ◽  
pp. 1808-1817 ◽  
Author(s):  
Paul A. Kempler ◽  
Robert H. Coridan ◽  
Nathan S. Lewis
Keyword(s):  
Electrochemical Behavior ◽  
Gas Bubbles ◽  
Silicon Microwire ◽  
Hydrogen Evolving Cathodes

Silicon microwire-arrays mitigate the effects of gas bubbles on the total overpotential of hydrogen-evolving cathodes oriented against gravity.

Optical and electrochemical effects of H2 and O2 bubbles at upward-facing Si photoelectrodes

2021 ◽  
Author(s):  
Paul A. Kempler ◽  
Zachary P. Ifkovits ◽  
Weilai Yu ◽  
Azhar I. Carim ◽  
Nathan S. Lewis
Keyword(s):  
Water Splitting ◽  
Gas Bubbles ◽  
Photoelectrochemical Water Splitting ◽  
Planar Silicon ◽  
Silicon Microwire

Planar silicon and silicon microwire arrays oriented towards sunlight release layers of small gas bubbles that stir the electrolyte and do not impede photoelectrochemical water splitting.

Fission Gas Bubbles in Fractured UO2

1968 ◽  
Vol 26 ◽  
pp. 286-287
Author(s):  
O. M. Katz
Keyword(s):  
Electron Microscopy ◽  
Thermal Gradient ◽  
Gas Bubbles ◽  
Inert Gas ◽  
Thermal Gradients ◽  
Fission Gas ◽  
Beam Heating ◽  
Limited Application ◽  
Bubble Characteristics ◽  
Electron Beam Heating

The swelling of irradiated UO2 has been attributed to the migration and agglomeration of fission gas bubbles in a thermal gradient. High temperatures and thermal gradients obtained by electron beam heating simulate reactor behavior and lead to the postulation of swelling mechanisms. Although electron microscopy studies have been reported on UO2, two experimental procedures have limited application of the results: irradiation was achieved either with a stream of inert gas ions without fission or at depletions less than 2 x 1020 fissions/cm3 (∼3/4 at % burnup). This study was not limited either of these conditions and reports on the bubble characteristics observed by transmission and fractographic electron microscopy in high density (96% theoretical) UO2 irradiated between 3.5 and 31.3 x 1020 fissions/cm3 at temperatures below l600°F. Preliminary results from replicas of the as-polished and etched surfaces of these samples were published.

Electrochemical behavior of self-assembled monolayers based on functionalized oligothiophenes

1998 ◽  
Vol 95 (6) ◽  
pp. 1339-1342 ◽  
Author(s):  
R. Michalitsch ◽  
A. El Kassmi ◽  
P. Lang ◽  
A. Yassar ◽  
F. Garnier
Keyword(s):  
Electrochemical Behavior ◽  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled

Corrosion-electrochemical behavior of β-W based CVD coatings in NaCl solution

2019 ◽  
pp. 29-32
Author(s):  
V.V. Dushik ◽  
◽  
G.V. Redkina ◽  
N.V. Rozhanskii ◽  
T.V. Rybkina ◽  
...  
Keyword(s):  
Electrochemical Behavior ◽  
Nacl Solution ◽  
Corrosion Electrochemical Behavior

Study of Electrochemical Behavior of Some Dental Alloys

2018 ◽  
Vol 69 (6) ◽  
pp. 1598-1602
Author(s):  
Alice Arina Ciocan Pendefunda ◽  
Constanta Mocanu ◽  
Doriana Agop Forna ◽  
Cristina Iordache ◽  
Elena Luca ◽  
...  
Keyword(s):  
Oral Cavity ◽  
Electrochemical Behavior ◽  
Base Alloy ◽  
Artificial Saliva ◽  
Surface Condition ◽  
Continuous Process ◽  
Metal Alloys ◽  
Alloy Surface ◽  
Dental Alloys ◽  
Dental Restorations

The purpose of the study is to investigate the electrochemical behavior of two dental alloys: palladium alloy (Palidor) and Ni-Cr alloy (Verasoft) in three types of artificial saliva. Determination of corrosion potential and recording of linear and cyclic polarization curves were performed with PGP201 potentiostat (VoltaLab 21- Radelkis Copenhagen. In order to study the modifications produced on the surface of the electrodes, a complex optical microscope MC 1 research type (IOR, Romania) was used, adapted to a digital camera, which was connected to a computer for the digital acquisition of images . Two metal alloys based on Ag-Pd and Ni-Cr were used for the experiments. The materials used came from different types of dental restorations removed from the oral cavity of the patients after a 5-15 years period. As corrosion environments, three artificial saliva were used: Fusayama, Afnor and Rondelli. The Pd-Ag dental alloy exhibits a very good corrosion resistance and the treatment in the Afnor saliva does not affect the surface of the alloy. Electrochemical behavior in Fusayama-Meyer�s saliva of the alloy surface results in a series of spots representing deposits of insoluble salts resulting from the oxidation process, while in the Rondelli saliva there is a series of small corrosion points on the alloy surface. The behavior of the Verasoft alloy in the Afnor and Rondelli saliva is similar; In both solutions, the potential breakthroughs are very close, but in Fusayama-Meyer�s saliva, the potential for initiation of corrosion points is very low (206 mV), a potential that can be encountered in the oral cavity. All metals and metal alloys, even the noble and semi-precious ones, are susceptible to corrosion, forming compounds with properties different from those of the metal or base alloy, which change their surface condition. Metallic dental restorations are permanently affected by the factors of the oral environment (physical-mechanical, chemical and biological), being subjected to a continuous process of degradation.

Photosynthesis as a Possible Source of Gas Bubbles in Shallow Sandy Coastal Sediments

2011 ◽  
Author(s):  
D. V. Holliday ◽  
C. F. Greenlaw ◽  
David Thistle ◽  
Jan E. Rines
Keyword(s):  
Gas Bubbles ◽  
Coastal Sediments
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