Adsorption of nonmetallic elements on defect-free MgO(001) surface - DFT study

Pasti, Igor A. (author)

Baljozovic, Milos (author)

Skorodumova, Natalia V. (author): Uppsala universitet,KTH,Flerskalig materialmodellering,Uppsala Univ, Dept Phys & Astron, Sweden,Materialteori

(creator_code:org_t)

Elsevier BV, 2015
2015
English.
In: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 632, s. 39-49

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; https://urn.kb.se/re...; show less...

Abstract Subject headings

Adsorption of 11 non-metals (H, B, C, N, O, F, Si, P, S, Cl and Br) on defect-free MgO(001) surface was investigate using DFT approach. Adsorption energies were found to be between -0.56 eV (hydrogen adsorption) and -2.63 eV (carbon adsorption). Charge transfer from substrate to adsorbate was observed to follow the periodicity in the Periodic Table of Elements, as increases from left to right and decreases from top to bottom. All investigated adsorbates prefer oxygen sites on MgO surface. The analysis of adsorbate-MgO(001) electronic structure suggested that the electronic structure of the O adsorption center and adsorbate atom is molecule-like and there is no strong interaction with MgO electronic bands. Based on the obtained dataset for adsorption energies of selected non-metallic adsorbates (X) the reactivity of MgO towards the bond cleavage in the cases of X-X, H-X and HO-X bonds was discussed. Obtained results point to weak reactivity of MgO(001) towards atomic adsorption and low activity for bond cleavage. However, these results can be used as a starting point for the functionalization of MgO, particularly in the cases where bond cleavage activity and surface-mediated stabilization of dissociation products are desired.

NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)

By the author/editor: Pasti, Igor A.; Baljozovic, Milo ...; Skorodumova, Nat ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

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