The adsorption of bromide on an Ag(001) electrode has been investigated using in situ x-ray scattering methods. With increasing potential, the bromide undergoes a second order phase transition from a lattice gas to an ordered c(2×2) structure. The order parameter is consistent with the 2D Ising model prediction β0ex0ex=0ex0ex1/8. A comparison of x-ray and electrochemical measurements indicates significant lateral disorder at low coverages which decreases with increasing coverage.
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Ocko et al. (1997) studied this question.
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