Tunable reactivity of supported single metal atoms by impurity engineering of the MgO(001) support

Pasti, Igor A.KTH,Materialvetenskap,Univ Belgrade, Fac Phys Chem, Studentski Trg 12-16, Belgrade 11158, Serbia;KTH Royal Inst Technol, Dept Mat Sci & Engn, Sch Ind Engn & Management, Brinellvagen 23, S-10044 Stockholm, Sweden (author)

QC 20180503
Development of novel materials may often require a rational use of high price components, like noble metals, in combination with the possibility to tune their properties in a desirable way. Here we present a theoretical DFT study of Au and Pd single atoms supported by doped MgO(001). By introducing B, C and N impurities into the MgO(001) surface, the interaction between the surface and the supported metal adatoms can be adjusted. Impurity atoms act as strong binding sites for Au and Pd adatoms and can help to produce highly dispersed metal particles. The reactivity of metal atoms supported by doped MgO(001), as probed by CO, is altered compared to their counterparts on pristine MgO(001). We find that Pd atoms on doped MgO(001) are less reactive than on perfect MgO(001). In contrast, Au adatoms bind CO much more strongly when placed on doped MgO(001). In the case of Au on N-doped MgO(001) we find that charge redistribution between the metal atom and impurity takes place even when not in direct contact, which enhances the interaction of Au with CO. The presented results suggest possible ways for optimizing the reactivity of oxide supported metal catalysts through impurity engineering.

Johansson, BörjeUppsala universitet,KTH,Materialvetenskap,Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden.,Materialteori,KTH Royal Inst Technol, Dept Mat Sci & Engn, Sch Ind Engn & Management, Brinellvagen 23, S-10044 Stockholm, Sweden(Swepub:uu)borjejs (author)
Skorodumova, Natalia V.Uppsala universitet,KTH,Materialvetenskap,Uppsala Univ, Dept Phys & Astron, Box 516, S-75120 Uppsala, Sweden.,Enheten strukturer,Materialteori,KTH Royal Inst Technol, Dept Mat Sci & Engn, Sch Ind Engn & Management, Brinellvagen 23, S-10044 Stockholm, Sweden(Swepub:uu)nasko424 (author)
KTHMaterialvetenskap (creator_code:org_t)

In:Physical Chemistry, Chemical Physics - PCCP: Royal Society of Chemistry20:9, s. 6337-63461463-90761463-9084

By the author/editor: Pasti, Igor A.; Johansson, Börje; Skorodumova, Nat ...

About the subject

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

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