Warming Curves for the Condensed Product of Dissociated Water Vapor and for Hydrogen Peroxide Glass

1957 ◽  
Vol 79 (8) ◽  
pp. 1862-1865 ◽  
Author(s):  
John A. Ghormley
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Condensed Product

Studies on hydrogen–oxygen systems in the electrical discharge. III. Surface effects

1970 ◽  
Vol 48 (13) ◽  
pp. 2042-2046 ◽  
Author(s):  
Paul E. Brunet ◽  
Xavier Deglise ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Power Level ◽  
Surface Effects ◽  
Surface Coatings ◽  
Pure Hydrogen ◽  
Pyrolysis Products ◽  
Electrodeless Discharge ◽  
Oxygen Gas ◽  
Hydrogen Peroxide Vapor

Surface effects in the reactions of dissociated hydrogen–oxygen systems and the products condensed therefrom have been investigated. Water vapor at about 0.1 Torr was streamed at high velocity through an electrodeless discharge confined in tubes of different materials or with various surface coatings. In all cases the products trapped in liquid nitrogen evolved oxygen gas on warming, but the relative amounts varied considerably from one type of surface to another. In some cases there was clear evidence that the walls of discharge tube were attacked by hydrogen atom bombardment. The decomposition, both thermal and electrical, of pure hydrogen peroxide vapor was studied likewise. The pyrolysis products gave off very little oxygen on warming. By contrast the products from electrical decomposition, even at low power level, evolved much oxygen, most of it above the melting point.It is concluded that there is always some decomposition of hydrogen peroxide in the trapped products. However, this does not seem sufficient to account for all the evolved oxygen; at least not in the case of dissociated water vapor.

REACTIONS IN DISSOCIATED WATER VAPOR

1951 ◽  
Vol 29 (11) ◽  
pp. 996-1009 ◽  
Author(s):  
R. A. Jones ◽  
C. A. Winkler
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Room Temperature ◽  
Reaction Chamber ◽  
Glass Wool ◽  
Cold Trap ◽  
Slight Effect ◽  
Reaction Chambers ◽  
Limiting Value ◽  
Water Hydrogen

Water vapor dissociated by an electric discharge and passed into a cold trap yielded products which gave off oxygen at temperatures above −120°C. and at room temperature consisted of hydrogen peroxide and water. With products formed under given conditions, the amount of oxygen evolved with warming was proportional to the total amount of product and independent of the warming procedure. The evolution proceeded to completion at −78°C. Water was found at all trap temperatures between −78°C. and −195°C. Hydrogen peroxide was formed only if the trap temperature was below −120°C., and oxygen was evolved only from products formed below −150°C. The yields of water, hydrogen peroxide, and evolved oxygen all increased with decreasing trap temperature. As the volume of reaction chambers inserted between the discharge tube and the trap was increased, the yield of hydrogen peroxide decreased continuously, while the yield of water at first decreased and then increased to a limiting value. Packing a given reaction chamber with glass wool drastically reduced the yield of hydrogen peroxide, but had little effect on the yield of water. Packing the trap itself had only a slight effect on the yields. The results are compared with those obtained by others with the H–O2 system at low temperatures, and a mechanism is proposed to correlate the two systems.

Hydrogen Peroxide: A Novel Mechanism of Its Production from Pure Water

2021 ◽  
Vol 11 ◽  
Author(s):  
Editorial Office ROS
Keyword(s):  
Reactive Oxygen Species ◽  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Free Radical ◽  
Pure Water ◽  
Biological Significance ◽  
Spontaneous Generation ◽  
Oxygen Species ◽  
Spontaneous Production ◽  
Research Findings

The latest cutting-edge research findings published in highly influential journals have greatly advanced our current understanding of hydrogen peroxide (H₂O₂), a notable reactive oxygen species, in chemistry, biology, and medicine. In this context, recent studies by J.K. Lee et al., published in Proc Natl Acad Sci USA, discovered a novel mechanism of spontaneous production of H₂O₂ from pure water in the absence of catalysts or external electric field. This discovery by J.K. Lee et al. has changed our view on the chemical connection between H₂O₂ and H₂O though the biological significance of the discovery remains unknown. REFERENCES Hopkins RZ, Li YR. Essentials of Free Radical Biology and Medicine. Cell Med Press, Raleigh, NC, USA. 2017. Hopkins RZ. Hydrogen peroxide in biology and medicine: an overview. React Oxyg Species (Apex) 2017; 3(7):26–37. doi: https://dx.doi.org/10.20455/ros.2017.809. Bergman P, Parise B, Liseau R, Larsson B, Olofsson H, Menten KM, et al. Detection of interstellar hydrogen peroxide. Astronomy Astrophysics 2011; 531:L8. doi: https://dx.doi.org/10.1051/0004-6361/201117170. Lee JK, Walker KL, Han HS, Kang J, Prinz FB, Waymouth RM, et al. Spontaneous generation of hydrogen peroxide from aqueous microdroplets. Proc Natl Acad Sci USA 2019; 116(39):19294‒8. doi: https://dx.doi.org/10.1073/pnas.1911883116. Lee JK, Han HS, Chaikasetsin S, Marron DP, Waymouth RM, Prinz FB, et al. Condensing water vapor to droplets generates hydrogen peroxide. Proc Natl Acad Sci USA 2020; 117(49):30934‒41. doi: https://dx.doi.org/10.1073/pnas.2020158117.

Effect of water vapor on chemical transport of zinc oxide by hydrogen peroxide

2006 ◽  
Vol 80 (12) ◽  
pp. 1999-2001
Author(s):  
G. L. Grigoryan ◽  
L. G. Tadevosyan ◽  
P. S. Gukasyan
Keyword(s):  
Hydrogen Peroxide ◽  
Zinc Oxide ◽  
Water Vapor ◽  
Chemical Transport ◽  
Effect Of Water

STUDIES ON HYDROGEN–OXYGEN SYSTEMS IN THE ELECTRIC DISCHARGE: I. THE REACTIONS OF HYDROGEN ATOMS WITH HYDROGEN PEROXIDE

1966 ◽  
Vol 44 (8) ◽  
pp. 869-876 ◽  
Author(s):  
Norisuke H Ata ◽  
Paul A. Glguère
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Electric Discharge ◽  
Hydrogen Gas ◽  
Reaction Products ◽  
Hydrogen Atoms ◽  
Eutectic Melting ◽  
Electrodeless Discharge ◽  
Liquid Nitrogen Trap ◽  
Unidentified Species

Hydrogen gas partly dissociated in an electrodeless discharge was mixed downstream with hydrogen peroxide vapor at low pressure (0.1 mm Hg) in a liquid nitrogen trap. The reaction products condensed readily on the wall as a clear, yellowish glass resembling that from dissociated water vapor and other related systems. A manometric study of the warming-up process has revealed four distinct steps. The first two, in which only traces of gas are given off, look like the recombination of trapped free radicals. The major evolution of oxygen upon crystallization of the glassy deposit at 160 °K is ascribed to the decomposition of hydrogen peroxide under the influence of some unidentified species generated in the electric discharge through hydrogen. Experimental evidence for this is presented. In any case the stoichiometry cannot be reconciled with the formation of a metastable intermediate, such as the hypothetical polyoxide H2O4.In the last step beginning around 215 °K more peroxide is decomposed during the eutectic melting of the solid. Qualitatively these phenomena are similar to those shown by the condensate from dissociated water vapor.

scholarly journals Seasonal variations of hydrogen peroxide and water vapor on Mars: Further indications of heterogeneous chemistry

2015 ◽  
Vol 578 ◽  
pp. A127 ◽  
Author(s):  
T. Encrenaz ◽  
T. K. Greathouse ◽  
F. Lefèvre ◽  
F. Montmessin ◽  
F. Forget ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Water Vapor ◽  
Seasonal Variations ◽  
Heterogeneous Chemistry
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