Partial dissociation of water on a MgO(100) film

Abstract

The adsorption of water at 100 K on an ordered film of MgO͑100͒ prepared on Mo͑100͒ is studied by low energy electron diffraction, HREELS ͑high resolution electron energy loss spectroscopy͒, and UPS ͑ultraviolet photoelectron spectroscopy͒. The appearance of the loss of OH species from HREELS and the 3 valence features of the hydroxyl from UPS indicate that the water can be partially dissociated on MgO͑100͒/Mo͑100͒ at the initial coverages. The experimental results are in good agreement with the theoretical calculations.

Role of Hydroxyl Groups in the Basic Reactivity of MgO: a Theoretical and Experimental Study

“…Defects modeled in the present work are shown with red (O 2-) and green (Mg 2+ ) spheres. The simulation of the MgO(100) surface has been extensively investigated and reported in the literature [14][15][16][17][18][19][20] and the conclusions are consistent with the experiments [19,21,22]: both dissociative and molecular adsorptions of H 2 O are observed on MgO(100).…”

Alkali-helium snowball complexes formed on helium nanodroplets

“…Ion-induced electrostatic interactions are of fundamental importance in various fields of physics, chemistry and biology [1,2]. Ions implanted in an ultracold helium (He) environment are of particular interest due to the influence of superfluidity on the mobility and on the He density distributions around the embedded ions.…”

Water adsorption on graphene/Pt(111) at room temperature: A vibrational investigation

“…In fact, the adsorption of water on surfaces involves a complex combination of electrostatic, van der Waals, and hydrogen bonding interactions. [21][22][23][24][25][26] Herein we report on high-resolution electron energy loss spectroscopy (HREELS) measurements on water adsorption on quasi-freestanding monolayer graphene (MLG) grown on Pt(111). HREEL experiments indicate that water molecules dosed at room temperature onto the graphene sheet can dissociate giving rise to C-H vibrational bands.…”