Studies on Chemisorption of Nitrogen on Molybdenum with the Field Emission Microscope

Abstract

The microscopic studies of N 2 on Mo have been made and compared with the results of the macroscopic studies. The non-dissociative chemisorption ε occurs on the crystal planes of average five nearest neighbours, and the ε -adatoms increase the work function of these planes as much as 0.5 eV. While, the dissociative chemisorption ζ occurs on the planes of four nearest neighbours, and the ζ-adatoms lower the work function slightly, 0∼0. 5 eV. On the planes on which the ε and ζ-adsorptions take place contiguously, the values of the work function changes lie between 0 eV and +0.5 eV. The results for Mo are similar to those for W.