FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2003099229> ?p ?o ?g. }

• W2003099229 endingPage "7397" @default.
• W2003099229 startingPage "7385" @default.
• W2003099229 abstract "Carbon monoxide (CO) oxidation on Pd(111) surfaces has been studied by molecular beam methods with mixed molecular beams (CO + O2) between 400 and 900 K and a CO:O2 ratio of 7:1 to 1:10. A new aspect of the above reaction observed in the transient kinetics regime is the evidence for oxygen diffusion into Pd(111) subsurface layers and its significant influence toward CO oxidation at high temperatures (≥600 K). An overall influence of subsurface oxygen on the kinetics of the CO oxidation reaction is addressed. Interesting information derived from the above studies is the necessity to fill up the subsurface layers with oxygen atoms to a threshold coverage (θOsub), above which the reactive CO adsorption occurs on the surface with subsequent CO2 production. The above observation was demonstrated with CO-rich reactant compositions (CO + O2) above 600 K via instant oxygen adsorption on Pd surfaces; however, onset of CO adsorption as well as CO2 production occurs after a time delay. θOsub and the time delay in CO adsorption (and CO2 production) increase with increasing temperature and with CO-rich compositions. θOsub was measured up to 0.3 monlayer (ML) between 500 and 850 K before the onset of CO adsorption; however, θOsub increases from an insignificant value at <500 K to 0.4 ML at 900 K with a pure O2 beam. Onset of CO adsorption with a significant sticking coefficient on the Pd surfaces, that is, covered with significant subsurface oxygen, underscores a change in the electronic state of Pd surfaces toward mildly oxidized (or Pdδ+), and an electronic decoupling occurs between the bulk and the surface. The jellium model is invoked to demonstrate the changes observed. A similar observation with polycrystalline Pd surfaces suggests the defect sites is one of the channels for oxygen diffusion into subsurfaces. Initial sticking coefficient (s0) measurements demonstrate that there is no significant competition between CO and O2 adsorption from the CO + O2 mixture between 400 and 600 K, and indeed they are largely independent of each other. The maximum steady-state CO2 formation rate was observed for a 1:1 CO/O2 beam composition between 500 and 550 K. However, with a significant θOsub the rate of CO2 production in the steady state is considerable even at high temperatures (700−850 K), and a broadening of the active CO oxidation regime to high temperature is observed with O2-rich compositions." @default.
• W2003099229 created "2016-06-24" @default.
• W2003099229 creator A5030363496 @default.
• W2003099229 creator A5030588247 @default.
• W2003099229 creator A5055502791 @default.
• W2003099229 date "2009-04-03" @default.
• W2003099229 modified "2023-09-26" @default.
• W2003099229 title "A Revisit to Carbon Monoxide Oxidation on Pd(111) Surfaces" @default.
• W2003099229 cites W1518096901 @default.
• W2003099229 cites W1618744869 @default.
• W2003099229 cites W1655456551 @default.
• W2003099229 cites W1965695591 @default.
• W2003099229 cites W1970035572 @default.
• W2003099229 cites W1973914062 @default.
• W2003099229 cites W1974235383 @default.
• W2003099229 cites W1978773015 @default.
• W2003099229 cites W1980929676 @default.
• W2003099229 cites W1983186639 @default.
• W2003099229 cites W1985163490 @default.
• W2003099229 cites W1987811445 @default.
• W2003099229 cites W1992870811 @default.
• W2003099229 cites W1994799796 @default.
• W2003099229 cites W1996558474 @default.
• W2003099229 cites W1998838961 @default.
• W2003099229 cites W2003452618 @default.
• W2003099229 cites W2004660849 @default.
• W2003099229 cites W2008893762 @default.
• W2003099229 cites W2013540315 @default.
• W2003099229 cites W2013572388 @default.
• W2003099229 cites W2015298320 @default.
• W2003099229 cites W2015345033 @default.
• W2003099229 cites W2016560098 @default.
• W2003099229 cites W2020633468 @default.
• W2003099229 cites W2021439763 @default.
• W2003099229 cites W2025273244 @default.
• W2003099229 cites W2027095238 @default.
• W2003099229 cites W2029685460 @default.
• W2003099229 cites W2031775638 @default.
• W2003099229 cites W2031796886 @default.
• W2003099229 cites W2032610705 @default.
• W2003099229 cites W2032765089 @default.
• W2003099229 cites W2035444466 @default.
• W2003099229 cites W2038196327 @default.
• W2003099229 cites W2040906876 @default.
• W2003099229 cites W2041215809 @default.
• W2003099229 cites W2042119868 @default.
• W2003099229 cites W2044543211 @default.
• W2003099229 cites W2044595242 @default.
• W2003099229 cites W2046464951 @default.
• W2003099229 cites W2046484923 @default.
• W2003099229 cites W2047488481 @default.
• W2003099229 cites W2047542369 @default.
• W2003099229 cites W2048290983 @default.
• W2003099229 cites W2048504469 @default.
• W2003099229 cites W2053319020 @default.
• W2003099229 cites W2054455613 @default.
• W2003099229 cites W2057840721 @default.
• W2003099229 cites W2060180899 @default.
• W2003099229 cites W2061372572 @default.
• W2003099229 cites W2064990712 @default.
• W2003099229 cites W2066327724 @default.
• W2003099229 cites W2067232632 @default.
• W2003099229 cites W2070600058 @default.
• W2003099229 cites W2072029695 @default.
• W2003099229 cites W2075054906 @default.
• W2003099229 cites W2075506016 @default.
• W2003099229 cites W2079002063 @default.
• W2003099229 cites W2083733070 @default.
• W2003099229 cites W2107236095 @default.
• W2003099229 cites W2117210111 @default.
• W2003099229 cites W2126074017 @default.
• W2003099229 cites W2140407993 @default.
• W2003099229 cites W2143531360 @default.
• W2003099229 cites W2165960457 @default.
• W2003099229 cites W2220129650 @default.
• W2003099229 cites W2416191663 @default.
• W2003099229 cites W4252197715 @default.
• W2003099229 doi "https://doi.org/10.1021/jp900890w" @default.
• W2003099229 hasPublicationYear "2009" @default.
• W2003099229 type Work @default.
• W2003099229 sameAs 2003099229 @default.
• W2003099229 citedByCount "42" @default.
• W2003099229 countsByYear W20030992292012 @default.
• W2003099229 countsByYear W20030992292013 @default.
• W2003099229 countsByYear W20030992292014 @default.
• W2003099229 countsByYear W20030992292015 @default.
• W2003099229 countsByYear W20030992292016 @default.
• W2003099229 countsByYear W20030992292017 @default.
• W2003099229 countsByYear W20030992292018 @default.
• W2003099229 countsByYear W20030992292020 @default.
• W2003099229 countsByYear W20030992292021 @default.
• W2003099229 countsByYear W20030992292023 @default.
• W2003099229 crossrefType "journal-article" @default.
• W2003099229 hasAuthorship W2003099229A5030363496 @default.
• W2003099229 hasAuthorship W2003099229A5030588247 @default.
• W2003099229 hasAuthorship W2003099229A5055502791 @default.
• W2003099229 hasConcept C104779481 @default.
• W2003099229 hasConcept C107872376 @default.

• next