抄録
The microsocopic studies of N2 on W have been made and compared with the results of the macroscopic studies. The sites of the non-dissociative chemisorption ε exist on and around the (111) plane and around the (011) plane, and the ε-adatoms increase the work function of these planes as much as 0.5 eV. While, the sites of the dissociative chemisorption ζ are on and around the (001) and (111) planes, and the work function is lowered as much as 0.2 eV by the ζ-adsorption. The situation of the α-site is not determined because of its small amount.
The previous studies of the work function change are interpreted reasonably by the αεζ-model without the suspision of impurities. These interpretations entirely differ from those of Ehrlich et al. by the αβ-model.
