The rates of oxidation of several faces of a single crystal of copper as determined with elliptically polarized light

Young, F. W.; Cathcart, J. V.; Gwathmey, Allan T.

doi:10.1016/0001-6160(56)90132-8

Cited by 237 publications

(111 citation statements)

References 11 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…Also depicted are the values of kl, obtained by the fits of eq. (9). In this model the midway reaction probability P is about equal to 0.6 kl in the considered temperature range, indicating that the slope of an Arrhenius plot of P is approximately equal to the activation energy of the reaction, of which kl is the rate constant.…”

Section: The Oxidation Of Co By Preadsorbed Oxygenmentioning

confidence: 75%

See 1 more Smart Citation

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

1979

View full text Add to dashboard Cite

Ellipsometry, LEED and Auger electron spectroscopy have been used to study the interactions of Oa and NzO with a clean annealed Cu(ll0) surface and the reaction of CO with adsorbed oxygen in the monolayer range. Gas pressures were in the range 1O-8-1O-4 Torr and crystal temperatures varied between 23-4OO'C. The changes in the ellipsometric angles A and $I per oxygen atom upon adsorption and removal of oxygen depend on the coverage 0, the temperature and on the azimuth of the plane of incidence of the light beam. The kinetics of the chemisorption of oxygen is independent of the crystal temperature, initial sticking probabiiity ~0.2. The LEED data and the adsorption kinetics indicate an attractive interaction in the adsorbed layer in the [OOl] direction. The initial decomposition probabi~~y of NaO at room temperature is 0.15 and decreases with increasing temperature; the maximum coverage is 0.5 monolayer. The LEED patterns observed were the same as those with 0s. The reaction probability of CO with adsorbed oxygen increases with decreasing oxygen coverage (order of mag nitude -1O-5, apparent activation energy -6 kcaI/mol). This increase has been attributed to the operation of the Langmuir-Hinshelwood mechanism.

show abstract

Section: The Oxidation Of Co By Preadsorbed Oxygenmentioning

confidence: 75%

“…E~~~sornetri~ results obtained at atmospheric pressure and at temperatures from 70 to f7g=C showed rapid oxidation of Cu(ll0) within the range of oxide thicknesses IO-I 60 A, but no data in the s~bmo~o~a~er range have been reported [9].…”

Section: Introductionmentioning

confidence: 91%

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

1979

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7] Notable studies of copper oxidation have been published over the past six decades since copper was included in the original work of Cabrera and Mott. 8 General findings that are consistent throughout a range of studies indicate that oxidation proceeds from chemisorption of atomic oxygen to the formation of an oxygen deficient induction layer that facilitates the growth of three-dimensional Cu 2 O islands.…”

Section: Introductionmentioning

confidence: 99%

Atomistic simulations of copper oxidation and Cu/Cu2O interfaces using charge-optimized many-body potentials

et al. 2011

View full text Add to dashboard Cite

Presented is a charge optimized many body potential (COMB) for metallic copper and copper oxide systems based on an extended Tersoff formalism coupled with variable charge electrostatics. To faithfully reproduce interactions between molecular oxygen and the metal surface, the potential includes atomic polarizabilities via both a point dipole model and dynamic partial charges, both of which are equilibrated through an extended Lagrangian scheme. The potential is fit to a training set composed of both experimental and ab initio computational data for cohesive energies, formation enthalpies, elastic properties and surface energies of several metallic and oxide phases as well as bond dissociation energies for molecular oxygen and several of its anions. The potential is used in molecular dynamics simulations to model the Cu(111)||Cu 2 O(100) interface and the oxidation of the Cu(100) surface.

show abstract

“…It has been proposed that this surface oxide has the composition of a Cu20 compound [2 1 I. Shake-up satellites in XI'S, characteristic for CuO have been observed only after oxygen exposures of 10' L at 3OO'C [6]. An earlier ellipsometric study of the oxidation of Cu( 100) at atmospheric pressures and at temperatures of 70-178°C [22] revealed that the (100) plane has a larger oxidation rate than the other low-index copper surfaces and that under these conditions thick oxide layers (-1000 a) are readily formed.…”

Section: Fhpm Habraken Et Al /Adsorption Of Oxygen On Ch(lo0)mentioning

confidence: 99%

The adsorption and incorporation of oxygen on Cu(100) and its reaction with carbon monoxide; comparison with Cu(111) and Cu(110)

1980

View full text Add to dashboard Cite

Ellipsometry, LEED, Auger electron spectroscopy and monitoring of work function changes have been used to study the interactions of 02 and N20 with a clean annealed Cu(100) surface and of the reaction of CO with sorbed oxygen. Gas pressures were in the range IO-'--lo4 Torr and crystal temperatures varied between 25-4OO'C. The initial interaction of oxygen with Cu(100) occurs in three stages. Oxygen chemisorbs with an initial sticking coefficient of -10T2 at room temperature and an apparent activation energy of 1.3-3.5 kcal/mol, depending on the substrate temperature. The first stage is the formation of a (42 X J2)R4S0 LEED pattern up to a coverage of 0.5, which is converted with an apparent activation energy of 3.2 kcal/mol to a (,/2 X 242}R45' structure at a coverage of 0.75 in the second stage. The work function increases inthe ftrst stage in an amount of -300 meV, but decreases in the second stage to the value of the clean surface. In a third stage after an induction period further oxygen uptake could be registered only with ellipsometry. The apparent activation energy is 4.5 kcal/mol. The initial decomposition probability of N20 at room temperature is 5 X 10m5, its apparent activation energy 3.2 kcal/mol. The LEED patterns observed were the same as with 02. The sorbed oxygen can be removed at all coverages with CO. The reaction appears to follow LangmuirHinshelwood kinetics with an activation energy for the reaction Goad + oad + CO2 of lP-20 kcal/mol. A comparison is made with the data obtained for Cu(ll1) and Cu(ll0).

show abstract

The rates of oxidation of several faces of a single crystal of copper as determined with elliptically polarized light

Cited by 237 publications

References 11 publications

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

The kinetics of the interactions of O2 and N20 with a Cu(110) surface and of the reaction of CO with adsorbed oxygen studied by means of ellipsometry, AES and LEED

Atomistic simulations of copper oxidation and Cu/Cu2O interfaces using charge-optimized many-body potentials

The adsorption and incorporation of oxygen on Cu(100) and its reaction with carbon monoxide; comparison with Cu(111) and Cu(110)

Contact Info

Product

Resources

About