In the last years, our group has used Molecular Dynamics simulations to investigate collisions between H and H
2 and various tungsten surfaces, relying on Density Functional Theory for the description of the interactions. Here, recent works on the dynamics of scattering of H atoms on clean and H-covered W surfaces will be reviewed, focussing on energy transfers upon H reflection and H
2 recombination. Besides, recent results on the influence of O and N impurities on H
2 sticking will be presented.
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