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- W4229764511 abstract "Current-potential (i-E) and reflectivity-potential (R/R0-E) curves have been recorded for the Au electrode in M HClO4 in the presence and in the absence of small amounts of metal cations such as Pb2+, Cd2+ and Cu2+. All the metals investigated were adsorbed on Au to form atomic submonolayers at potentials more positive than the reversible potential of the bulk phase. The formation of Pbad or Cdad gave rise to a marked increase in R/R0 at 450 nm. This returned to the original value when the adsorbed layer dissolved. The rate of adsorption was measured for Pb at constant potential. The plot of R/R0 against the square root of time gave a straight line, indicating that the rate is controlled by diffusion. At high concentration of Pb2+ (3×10−3M) the formation of another type of Pb adsorption was also observed on i-E and R/R0-E curves, but the reaction became suppressed before monolayer saturation. Deposition of Cu occurred likewise at a more positive value than the reversible potential, but the reflectivity change was not so pronounced either at 450 or 700 nm. At 450 nm, it increased while at 700 nm it decreased. The wavelength dependence of the change in R/R0 was also examined. Pb, Cd, and Cu increased the reflectivity at shorter wavelengths but only Pb and Cu decreased it at wavelengths longer than 600 nm; Cd did not change the reflectivity. The reflectivity change was explained on the basis of the difference in the wavelength dependence of the reflectivity of bulk metals." @default.
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- W4229764511 date "1973-01-10" @default.
- W4229764511 modified "2023-10-17" @default.
- W4229764511 title "Specular reflectivity change due to the faradaic adsorption of some metal cations on Au electrode in HClO4." @default.
- W4229764511 doi "https://doi.org/10.1016/0368-1874(73)85111-1" @default.
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