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Журнал Сибирского федерального университета. Химия. Journal of Siberian Federal University/ Chemistry  / №3 2016

DENSITY FUNCTIONAL CALCULATION OF DIOXYGEN ADSORPTION AT COMPLEXES OF CERIA NANOPARTICLE WITH ATOMS, TRIMERS AND TETRAMERS OF SILVER (150,00 руб.)

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Первый авторNasluzov
АвторыNeyman KonstantinM., Shor AlekseyM., Laletina SvetlanaS., Ivanova ElenaA.
Страниц15
ID576576
АннотацияMolecular adsorption (MA) and dissociative adsorption (DA) of O2 on complexes of a model nanoparticle Ce21O42 (NP) with an atom and small clusters of silver have been addressed. According to results of density functional calculations formation energies of such systems (with respect to the non-interacting NP, Agn and O2) are calculated to be 2.0–4.4 eV. O2 adsorption energy (Ead(O2)) in the lowest-energy atomic complex with О2 in a bridging position between Ce ion and Ag bound on the {111} nanofacet (AgOO{Ce}-complex) is as high as ~1.3 eV. AgnOO{Ce}- and OAgnO{Ce}- bridging structures are formed in MA and DA lowest-energy complexes of Ag3 on {100} and {111} as well as Ag4 on {100} nanofacets. Bonding characteristics of the AgnOO{Ce}-structures match those for stable superoxo groups О2–. Ead(О2) of the lowest-energy МА and DA complexes of O2 with Ag clusters are in the range of 0.5–1.1 and 1.4–2.0 eV, respectively. Activation energies for O2 dissociation in Ag nOO{Ce}complexes (n=3, 4) calculated to be 1.5–2.1 eV indicate low rates of these oxidation rearrangements.
УДК544.723.2:546.21
DENSITY FUNCTIONAL CALCULATION OF DIOXYGEN ADSORPTION AT COMPLEXES OF CERIA NANOPARTICLE WITH ATOMS, TRIMERS AND TETRAMERS OF SILVER / VladimirA. Nasluzov [и др.] // Журнал Сибирского федерального университета. Химия. Journal of Siberian Federal University/ Chemistry .— 2016 .— №3 .— С. 29-43 .— URL: https://rucont.ru/efd/576576 (дата обращения: 03.06.2024)

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Chemistry 3 (2016 9) 281-295 ~ ~ ~ УДК 544.723.2:546.21 Density Functional Calculation of Dioxygen Adsorption at Complexes of Ceria Nanoparticle with Atoms, Trimers and Tetramers of Silver Vladimir A. Nasluzova a , Konstantin M. Neymanb, c Svetlana S. <...> O2 the lowest-energy atomic complex with О2 on complexes of a model (NP) with an atom and small clusters of silver have been addressed. <...> According to results of density functional calculations formation energies of such systems (with respect to the non-interacting NP, Agn adsorption energy (Ead {111} nanofacet (AgOO{Ce}-complex) is as high as ~1.3 eV. <...> Agn structures are formed in MA and DA lowest-energy complexes of Ag3 Ag4 superoxo groups О2 on {100} nanofacets. <...> Ead (О2 (O2 in a bridging position between Ce ion and Ag bound on the OO{Ce}- and OAgn ) of the lowest-energy МА and DA complexes of O2 the range of 0.5–1.1 and 1.4–2.0 eV, respectively. <...> Activation energies for O2 )) in O{Ce}- bridging on {100} and {111} as well as OO{Ce}-structures match those for stable with Ag clusters are in OO{Ce}dissociation in Agn complexes (n=3, 4) calculated to be 1.5–2.1 eV indicate low rates of these oxidation rearrangements. <...> All rights reserved * Corresponding author E-mail address: sekr@icct.ru # 281 # Vladimir A. Nasluzov, Konstantin M. Neyman… <...> Density Functional Calculation of Dioxygen Adsorption at Complexes… <...> Расчеты адсорбции кислорода на комплексах наночастицы оксида церия с атомами, тримерами и тетрамерами серебра методом функционала плотности В.A. <...> Льюиса Компаниса 23, 08010 Барселона, Испания с/Марти и Франкес 1, 08028 Барселона, Испания в В статье <...>