Activation energy of hydrogenation

Influence of the Adjacent n-Bond on the Activation Energy of Hydrogen Atom Abstruction Reaction [13,18,24,28,29]... 

In the preparation of membrane through sol-gel method, the permeation characteristics of hydrogen and nitrogen belong to the Knudsen flow pattern, but water is different. The hydrogen permeation was dominated by the activated diffusion, and the activation energy of hydrogen was ca. 5 kJ/mol. 

The conformity of given reaction parameters to those obtained from empirical correlations for reactions of the same type for one reactant with other partners and/or even with participation of other species. For instance, the Polanyi-Semenov equation is a good approximation for activation energy of hydrogen atom transfer between two species (radicals or molecules) (see, for instance, Kondratyev and Nikitin, 1974). If the parameters for some reaction seriously... 

Tab. 2S.2 Activation energies of hydrogen diffusion on selected metal single costal surfaces [3].

Lowering of the Activation Energy of Hydrogen Peroxide Decomposition by Catalysts... 

Ni (0) catalyst can be produced with the aid of plasma. The activation energy of hydrogen production from sodium borohydride with this catalyst system was calculated as 51.35 kj moT With this approach the mass specific surface area can be increased from 0.0063 m g to 23.11 m g without the crystal structure deteriorating. The reason is thought to be the higher resistivity of plasma treated Ni to aggregations. Plasma treatment can enhance... 

Other recent studies have focused on the applicability of DFT methods for the calculation of activation energies of hydrogen abstraction reactions. " These studies conclude that the barriers for R —H -i- R2 R j -1- R2—H reac-... 

Table 7.16. Influence of adjacent jt bond on activation energy of hydrogen atom abstruction reaction.

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