FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2132458051> ?p ?o ?g. }

• W2132458051 endingPage "13152" @default.
• W2132458051 startingPage "13145" @default.
• W2132458051 abstract "Experimental catalytic activity measurements, diffuse reflectance infrared Fourier spectroscopy, and density functional theory calculations are used to investigate the role and dynamics of surface oxygen vacancies in CO oxidation with O2 catalyzed by Au nanoparticles supported on a Y-doped TiO2 catalyst. Catalytic activity measurements show that the CO conversion is improved in a second cycle of reaction if the reactive flow is composed by CO and O2 (and inert) while if water is present in the flow, the catalyst shows a similar behaviour in two successive cycles. DRIFTS-MS studies indicate the occurrence of two simultaneous phenomena during the first cycle in dry conditions: the surface is dehydroxylated and a band at 2194 cm−1 increases (proportionally to the number of surface oxygen vacancies). Theoretical calculations were conducted in order to explain these observations. On one hand, the calculations show that there is a competition between gold nanoparticles and OH to occupy the surface oxygen vacancies and that the adsorption energy of gold on these sites increases as the surface is being dehydroxylated. On the other hand, these results evidence that a strong electronic transfer from the surface to the O2 molecule is produced after its adsorption on the Au/TiO2 perimeter interface (activation step), leaving the gold particle in a high oxidation state. This explains the appearance of a band at a wavenumber unusually high for the CO adsorbed on oxidized gold particles (2194 cm−1) when O2 is present in the reactive flow. These simultaneous phenomena indicate that a gold redispersion on the surface occurs under reactive flow in dry conditions generating small gold particles which are very active at low temperature. This fact is notably favoured by the presence of surface oxygen vacancies that improve the surface dynamics. The obtained results suggest that the reaction mechanism proceeds through the formation of a peroxo-like complex formed after the electronic transfer from the surface to the gas molecule." @default.
• W2132458051 created "2016-06-24" @default.
• W2132458051 creator A5002112527 @default.
• W2132458051 creator A5003798471 @default.
• W2132458051 creator A5010418217 @default.
• W2132458051 creator A5016503447 @default.
• W2132458051 creator A5028683465 @default.
• W2132458051 creator A5078904860 @default.
• W2132458051 creator A5083582086 @default.
• W2132458051 date "2014-02-28" @default.
• W2132458051 modified "2023-10-02" @default.
• W2132458051 title "Surface oxygen vacancies in gold based catalysts for CO oxidation" @default.
• W2132458051 cites W1658980967 @default.
• W2132458051 cites W1785458172 @default.
• W2132458051 cites W1965781347 @default.
• W2132458051 cites W1970127494 @default.
• W2132458051 cites W1972384456 @default.
• W2132458051 cites W1973216795 @default.
• W2132458051 cites W1975825188 @default.
• W2132458051 cites W1979544533 @default.
• W2132458051 cites W1982320745 @default.
• W2132458051 cites W1982901141 @default.
• W2132458051 cites W1986252415 @default.
• W2132458051 cites W1989589846 @default.
• W2132458051 cites W1991972167 @default.
• W2132458051 cites W1992028354 @default.
• W2132458051 cites W1993075503 @default.
• W2132458051 cites W1999117984 @default.
• W2132458051 cites W1999731865 @default.
• W2132458051 cites W2002853978 @default.
• W2132458051 cites W2004020994 @default.
• W2132458051 cites W2006222261 @default.
• W2132458051 cites W2006783036 @default.
• W2132458051 cites W2007395042 @default.
• W2132458051 cites W2008370222 @default.
• W2132458051 cites W2008498887 @default.
• W2132458051 cites W2021429214 @default.
• W2132458051 cites W2022085321 @default.
• W2132458051 cites W2022190942 @default.
• W2132458051 cites W2025886488 @default.
• W2132458051 cites W2026157645 @default.
• W2132458051 cites W2027033400 @default.
• W2132458051 cites W2027265056 @default.
• W2132458051 cites W2030589371 @default.
• W2132458051 cites W2035902790 @default.
• W2132458051 cites W2036004864 @default.
• W2132458051 cites W2040778113 @default.
• W2132458051 cites W2040799444 @default.
• W2132458051 cites W2045282660 @default.
• W2132458051 cites W2052208208 @default.
• W2132458051 cites W2060190441 @default.
• W2132458051 cites W2064245900 @default.
• W2132458051 cites W2067207455 @default.
• W2132458051 cites W2067642063 @default.
• W2132458051 cites W2068397141 @default.
• W2132458051 cites W2070247802 @default.
• W2132458051 cites W2079105963 @default.
• W2132458051 cites W2081875670 @default.
• W2132458051 cites W2083064979 @default.
• W2132458051 cites W2083222334 @default.
• W2132458051 cites W2087617618 @default.
• W2132458051 cites W2090835769 @default.
• W2132458051 cites W2091140014 @default.
• W2132458051 cites W2108616198 @default.
• W2132458051 cites W2115004004 @default.
• W2132458051 cites W2119607070 @default.
• W2132458051 cites W2122075752 @default.
• W2132458051 cites W2153824414 @default.
• W2132458051 cites W2166785814 @default.
• W2132458051 cites W2328640011 @default.
• W2132458051 cites W2951715501 @default.
• W2132458051 cites W2951894306 @default.
• W2132458051 cites W3206606417 @default.
• W2132458051 cites W4211164327 @default.
• W2132458051 doi "https://doi.org/10.1039/c3ra46662k" @default.
• W2132458051 hasPublicationYear "2014" @default.
• W2132458051 type Work @default.
• W2132458051 sameAs 2132458051 @default.
• W2132458051 citedByCount "24" @default.
• W2132458051 countsByYear W21324580512015 @default.
• W2132458051 countsByYear W21324580512016 @default.
• W2132458051 countsByYear W21324580512017 @default.
• W2132458051 countsByYear W21324580512018 @default.
• W2132458051 countsByYear W21324580512019 @default.
• W2132458051 countsByYear W21324580512020 @default.
• W2132458051 countsByYear W21324580512021 @default.
• W2132458051 countsByYear W21324580512023 @default.
• W2132458051 crossrefType "journal-article" @default.
• W2132458051 hasAuthorship W2132458051A5002112527 @default.
• W2132458051 hasAuthorship W2132458051A5003798471 @default.
• W2132458051 hasAuthorship W2132458051A5010418217 @default.
• W2132458051 hasAuthorship W2132458051A5016503447 @default.
• W2132458051 hasAuthorship W2132458051A5028683465 @default.
• W2132458051 hasAuthorship W2132458051A5078904860 @default.
• W2132458051 hasAuthorship W2132458051A5083582086 @default.
• W2132458051 hasConcept C104819515 @default.
• W2132458051 hasConcept C113196181 @default.
• W2132458051 hasConcept C147789679 @default.

• next