Hydrogen atom recombination

Gdowski GE, Farr JA, Madix RJ. 1983. Reactive scattering of small molecules from platinum crystal surfaces D2CO, CH3OH, HCOOH and the nonanomalous kinetics of hydrogen atom recombination. Surf Sci 127 541. 

Thus, upon heating, CH30(a) and H(a) recombination occurred, and no hydrogen atom recombination was observed. 

I.R. Hurle, "Measurements of Hydrogen-Atom Recombination Rates Behind Shock Waves , llthSympCombstn (1967), 827-36... 

Another calculation that is of interest, but difficult to classify, is that of Wilson et a/.94 on the Hz-- He system. They are primarily interested in obtaining a potential surface on which to study the role of He as a third body in hydrogen atom recombination reactions, so that they include in their study configurations in which the H- -H distance is as large as 5 a.u., where the H-H interaction is quite small. They find that even in a calculation which does not include intermolecular correlation there are quite long-range contributions to non-additivity. 

Hydrogen atom recombination following shock ignition of rich H2—O2—diluent mixtures... 

Kilham and Dunham [50], and Milson and Chigier [51] used silica coatings to prevent catalyic hydrogen atom recombination on the platinum in the thermocouple [64]. Madson and Theby [52] showed that uncoated platinum alloy thermocouples significantly overpredicted temperature, compared to silica-coated thermocouples in an 02/Ar/CH4 flame. Pollock... 

Hoar and Bucklow (1) recently indicated that the hydrogen overvoltage in a citrate buffer solution for both tungsten and cobalt at 3 to 4 ma/cm is 0.1 volt. For a tungsten-cobalt alloy it is much lower. It would be interesting to determine whether the alloy is also a better catalyst for hydrogen atom recombination than either cobalt or tungsten. 

The effect of promoters has been attributed to poisoning of the hydrogen atom recombination, which is thought to increase the coverage of H ds [20] or to decrease the M-H ds bond energy [18]. Because the volatile hydrides of elements from Groups VB and VIB are strongly chemisorbed by clean metal surfaces, their action has also been linked to dissociative... 

The hydrogen atoms recombine into molecular hydrogen at an imper-fecture inside the vessel wall. The accumulating hydrogen forms a bubble and then a blister. 

In the schemes of flame inhibition by metallic compounds outlined above, it is assumed that an initial form (atomic metal) develops. If, however, the fuel vapors of sodium or potassium are introduced laterally to the methane-air flame with an oxidizing agent, no inhibitor effects are observed [103]. This confirms the importance of hydrogen atom recombination reactions inside the flame of fuel-rich systems. 

Denoting the rate constants of these processes by and kpj, respectively, and disregarding the reverse reaction (hydrogen atom recombination)... 

Hydrogen atoms recombine especially intensely on the surface of some compounds, for example, on the Zn0 Cr203 mixed oxide. Recombination is accompanied by heat liberation (436 kJ/mol). The presence of hydrogen atoms in the system is indicated by warming of the thermocouple, the surface of the capillary of which is covered with this compound. 

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