[en] The principal source of negative ion generation in hydrogen discharges is now recognized to be low-energy electron attachment to H₂(ν prime prime) molecules excited to the middle portion of the vibrational spectrum. Electron excitation processes are generally taken to be the principal source of H₂(ν prime prime) generation, with high-energy excitations through the singlet spectrum being the principal excitation process populating the active portion of the vibrational spectrum. A description of the collisional re-excitation from level ν prime prime, to level ν prime prime, requires 15 times 15 matrix of cross sections linking all initial and final levels. These cross sections have been evaluated and incorporated into the modelling code. An additional source of vibrational excitation may be derived from recombination of H₂⁺ and H₃⁺ ions on the surfaces of the discharge. In this case the molecular ions will impinge with kinetic energies given by the plasma potential, 1--10 eV. In this paper we report the evaluation of H₂(ν prime prime) resulting from the surface recombination process. The use of low-work-function materials for the discharge surfaces makes possible two additional source of negative ions: the direct formation of negative ions by hydrogen atoms rebounding from the surface, and the dissociation of H₂^- ions formed in the surface selvage. A recent paper has demonstrated the efficacy of Ba surfaces as an active medium for H^- formation. Here we shall extend our discussion to H₂⁺, H₃⁺ collisions on Ba surfaces and inventory the generation of H, H₂(ν prime prime), and H^- rebounding from these surfaces. 16 refs., 4 figs