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Abstract:
An Ag(111) surface has been used to investigate the dependence of the H2 sticking probability on the preadsorption of N2. The amount of physisorbed H2 is monitored by the electron energy loss intensities of the rotational transition J: 0 → 2. The N2 preadsorption strongly influences the H2 adsorption. At the achieved minimum temperature of about 20 K the H2 sticking probability is significantly enhanced by N2 preadsorption and the fractional H2 coverage increases with the fractional N2 precoverage. The coadsorption takes place within the first monolayer.
