Isotope Effects in the Formation of Molecular Hydrogen on a Graphite Surface via an Eley−Rideal Mechanism

2002 ◽  
Vol 106 (39) ◽  
pp. 8996-9008 ◽  
Author(s):  
Anthony J. H. M. Meijer ◽  
Adam J. Farebrother ◽  
David C. Clary
Keyword(s):  
Molecular Hydrogen ◽  
Isotope Effects ◽  
Graphite Surface

scholarly journals Isotope effects in complex scattering lengths for He collisions with molecular hydrogen

2010 ◽  
Vol 81 (1) ◽  
Author(s):  
J. L. Nolte ◽  
B. H. Yang ◽  
P. C. Stancil ◽  
Teck-Ghee Lee ◽  
N. Balakrishnan ◽  
...  
Keyword(s):  
Molecular Hydrogen ◽  
Isotope Effects ◽  
Scattering Lengths

Accommodation coefficients for molecular hydrogen on a graphite surface

2010 ◽  
Vol 45 (6) ◽  
pp. 975-981 ◽  
Author(s):  
V. L. Kovalev ◽  
A. N. Yakunchikov
Keyword(s):  
Molecular Hydrogen ◽  
Graphite Surface ◽  
Accommodation Coefficients

Isotope effects in the Lyman and Werner systems of molecular hydrogen

1970 ◽  
Vol 19 (4) ◽  
pp. 567-572 ◽  
Author(s):  
A.C. Allison ◽  
A. Dalgarno
Keyword(s):  
Molecular Hydrogen ◽  
Isotope Effects

Site and isotope effects on the molecular hydrogen elimination from ethylene at 157 nm excitation

1998 ◽  
Vol 109 (8) ◽  
pp. 2979-2982 ◽  
Author(s):  
Jim J. Lin ◽  
Dennis W. Hwang ◽  
Yuan T. Lee ◽  
Xueming Yang
Keyword(s):  
Molecular Hydrogen ◽  
Isotope Effects ◽  
Hydrogen Elimination

Elimination of Molecular Hydrogen and Methane from Collision-Activated Alkoxide Negative Ions in the gas Phase. An ab initio and Isotope Effect Study

1985 ◽  
Vol 38 (8) ◽  
pp. 1197 ◽  
Author(s):  
RN Hayes ◽  
JC Sheldon ◽  
JH Bowie ◽  
DE Lewis
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Gas Phase ◽  
Molecular Hydrogen ◽  
Isotope Effects ◽  
Negative Ions ◽  
Kinetic Isotope Effects ◽  
Effect Study ◽  
Negative Ion ◽  
Kinetic Isotope

Ab initio calculations indicate that the collisional induced losses of molecular hydrogen from the ethoxide negative ion and methane from the t- butoxide negative ion to be stepwise processes in which the key intermediates are [H-… MeCHO ] and [Me-…Me2CO] respectively. Deuterium kinetic isotope effects observed for these and other alkoxide negative ions are in accord with the operation of a stepwise reaction.

THE KINETICS OF RADICAL REACTIONS IN THE TRACKS OF FAST ELECTRONS. A DETAILED STUDY OF THE SAMUEL–MAGEE MODEL FOR THE RADIATION CHEMISTRY OF WATER

1958 ◽  
Vol 36 (11) ◽  
pp. 1518-1536 ◽  
Author(s):  
P. J. Dyne ◽  
J. M. Kennedy
Keyword(s):  
Molecular Hydrogen ◽  
Isotope Effects ◽  
Radiation Chemistry ◽  
Small Radius ◽  
Oh Radicals ◽  
Fast Electrons ◽  
Light Water ◽  
Diffusion Constants ◽  
Isotopic Separation ◽  
Kinetics Of

The kinetic behavior of a γ-ray spur produced in water, having H and OH radicals distributed spatially in the manner suggested by Samuel and Magee, has been studied using an electronic computer. The variation in yield of the molecular products H2, H2O2, and H2O with rate constants, diffusion constants, and spur size has been obtained. The model gives agreement with experiment choosing spurs with a small "radius" of the order of 10 Å. On simple assumptions, however, the model predicts no difference in the molecular yields between heavy and light water and no isotopic separation in the formation of molecular hydrogen from isotopically enriched light water. Various special assumptions needed to give agreement with experiment for these isotope effects are discussed. The observed isotopic separation in the formation of molecular hydrogen is attributed to the preferential dissociation of an H atom from an excited HDO molecule. It is found that the yield of molecular hydrogen is less sensitive to the presence of scavengers than the yield of hydrogen peroxide.

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