ABSTRACT
The difficulties in experiments are connected with the need to work in conditions of super-high vacuum and, most important, the need to obtain pure metal surfaces. The presence of traces of oxygen can noticeably influence the results of studies. Numerous X-ray photoelectron studies of CO and K coadsorption on various metals have appeared lately in connection with the large influence of additions of alkaline metals on the selectivity and catalytic activity of catalysts. In principle it is possible to increase the sensitivity of the method to the topmost surface layer by changing the photoelectron exit angle. Studies of recent years also indicate the dependence of the nature of adsorption and subsequent reactions of the adsorbent on the type of monocrystal surface. A change in the electron density of the adsorbate takes place during adsorption as a result of interaction of adsorbate and substrate.
