Reflection of hydrogen atoms from alkali and alkaline earth oxide surfaces

1991 ◽  
Vol 9 (3) ◽  
pp. 1650-1656 ◽  
Author(s):  
S. T. Melnychuk ◽  
M. Seidl
Keyword(s):  
Alkaline Earth ◽  
Oxide Surfaces ◽  
Hydrogen Atoms ◽  
Alkaline Earth Oxide

Synthesis and Characterization of Some Alkaline-Earth-Oxide Nanoparticles

2018 ◽  
Vol 72 (8) ◽  
pp. 890-899 ◽  
Author(s):  
Jitendra Pal Singh ◽  
Weon Cheol Lim ◽  
Sung Ok Won ◽  
Jonghan Song ◽  
Keun Hwa Chae
Keyword(s):  
Alkaline Earth ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Alkaline Earth Oxide

Highly Efficient CO2 Electrolysis on Cathodes with Exsolved Alkaline Earth Oxide Nanostructures

2017 ◽  
Vol 9 (30) ◽  
pp. 25350-25357 ◽  
Author(s):  
Lingting Ye ◽  
Changchang Pan ◽  
Minyi Zhang ◽  
Chunsen Li ◽  
Fanglin Chen ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Alkaline Earth Oxide ◽  
Highly Efficient ◽  
Oxide Nanostructures ◽  
Co2 Electrolysis

(Invited) Photoluminescence Properties of Alkaline-Earth Oxide Nanoparticles

2019 ◽  
Vol 28 (3) ◽  
pp. 67-80 ◽  
Author(s):  
Peter V. Sushko ◽  
Keith McKenna ◽  
D. Muñoz Ramo ◽  
A. L. Shluger ◽  
Andreas Sternig ◽  
...  
Keyword(s):  
Alkaline Earth ◽  
Oxide Nanoparticles ◽  
Photoluminescence Properties ◽  
Alkaline Earth Oxide

Effect of pressure on structural and elastic properties of alkaline-earth oxide CaO

2006 ◽  
Vol 60 (25-26) ◽  
pp. 3153-3155 ◽  
Author(s):  
L. Louail ◽  
O. Krachni ◽  
A. Bouguerra ◽  
F. Ali Sahraoui
Keyword(s):  
Elastic Properties ◽  
Alkaline Earth ◽  
Alkaline Earth Oxide ◽  
Effect Of Pressure

An X-Ray Study of the Structure of the Alkaline Earth Oxide Cathode

1962 ◽  
Vol 6 ◽  
pp. 185-190
Author(s):  
Paul Lublin
Keyword(s):  
Diffraction Study ◽  
Alkaline Earth ◽  
Thermionic Emission ◽  
X Ray Diffraction ◽  
Emission Data ◽  
Alkaline Earth Oxide ◽  
X Ray ◽  
Oxide Cathode

AbstractArt X-ray diffraction study has been conducted on the emissive coating (Ba, Sr, CaO) of experimental diodes from which thermionic emission data were taken before X-ray analysis. The tubes were then opened and the oxide protected by special techniques in order to prevent the formation of the hydroxide. In addition to X-ray diffraction, other techniques were used to give a complete description of the structures present.

Ionization of alkaline earth additives in hydrogen flames - I. Hydrogen atom concentrations and ion stabilities

1974 ◽  
Vol 338 (1613) ◽  
pp. 155-173 ◽  
Keyword(s):  
Alkaline Earth ◽  
Molecular Ions ◽  
The Other ◽  
Hydrogen Atoms ◽  
Ion Hydration ◽  
Atomic Ions ◽  
Charged Species ◽  
Hydration Energies ◽  
Three Body ◽  
Species Being

The ions present in flames of H 2 +O 2 + N 2 with trace quantities of an alkaline earth M ( = Ca or Sr) added to them have been studied mass spectrometrieally. Those detected were principally MOH + and M + , the only negatively charged species being the free electron. It was established that the reaction M + +H 2 O = MOH + +H was rapid enough to be balanced everywhere in a flame. Detailed studies of (I) provided a means for measuring the concentration of hydrogen atoms at the point of sampling in the flame from observations of [M + ]/[MOH + ]. It proved possible to make absolute determinations of [H]. In addition, the ionization potentials of CaOH and SrOH were measured as 5.7 ± 0.3 and 5.4 ± 0.3 eV, which values are slightly less than those for the corresponding alkaline earth atoms. Hydrates of MOH + and M + were observed, but it was concluded that ion-hydration is not an important flame process in this case, but rather one associated with cooling of gases as they are sampled into the mass spectrometer. It appears that molecular ions hydrate in a two-body process, e. g. MOH + + H 2 O → MOH + . H 2 O with a velocity constant, which is independent of temperature and approximately 1 x 10 –10 ml molecule –1 s –1 . Atomic ions on the other hand initially undergo hydration by a slower three-body step requiring a chaperon molecule. The first hydration energies at absolute zero for CaOH + and SrOH + were measured to be 120±20 and 109±15 kJ mol –1 respectively. These exceed the corresponding quantities for Ca + and Sr + , which were found to be 75±16 and 60±16 kJ mol –1 .

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