Interaction of H2 with (100) W. I. Binding States

摘要: Flash desorption mass spectrometry is used to study the structures and kinetics of hydrogen adsorption on (100) plane tungsten. It shown that there are two binding states, β1 β2, in a saturation ratio 2:1 which obey first‐ second‐order kinetics, respectively. The activation energies 26.3 32.3 kcal mole−1 both vary with coverage by less than 0.5 monolayer−1. Deuterium isotope effects, exchange, replacement also examined. These results combined recent LEED measurements for this system formulate structure adsorbate appears quantitatively explain presently available data. This be reasonable basis electronic substrate predicts multiple c(2 × 2) structure, island formation at low as observed.