(1) The stable molecular hydrogen exists on the surface of platinumin the
1∑
g ground state.
(2) The electronic state is not so much perturbed by the adsorption.
(3) The desorption of the adsorbed molecule from the platinumsurface by a slow electron impact is due to the generation of theatom or proton having the kinetic energy caused by an inelastic collision.That is, it is due to the transition from the ground state to the triplet nstates, and to the unstable states of H
+2 and H
++2.
(4) The stable presence of H
+2(
2∑) adsorbed on the surface of platinum has been experimentally ascertained. The fourth maximum is presumably due to its very presence.
(5) The atom and proton adsorbed are not desorbed by the present method. Therefore, their presence could not be directly ascertained, though there are reasons to believe their existence on the surface.
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