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Influence of microstructural heterogeneities on hydrogen evolution at different scales

Alami H.El, Creus J., Sabot R., Feaugas X.

Advances in Materials Science

2007

Vol. 7, nr 1(11)

140-146

The present work focuses on the influence of different levels of microstructural heterogeneities, observed on polycrystalline f.c.c. metal on Hydrogen Evolution Reaction efficiency. The effect of grain size and plastic strain on polycrystalline nickel is analysed, as well as the influence of crystallographic orientation and plastic strain of law index single crystals. A particular attention bas been devoted to kinetic and thermodynamic parameters which characterise hydrogen adsorption and desorption.