Anion desorption

Figure 16.4. Evolution of qc (Hupd adsorption) and qci+qci qci eorresponds to anions desorption) vs. the number of CV transients between 0.05 and 0.80 V in 0.05 M aqueous HCIO4 (circles) and in 0.5 M aqueous HCIO4 (triangles).

E < -0.1 V, is determined by hydrogen adsorption, coupled with anion desorption, from the (111)-(111) or (110)-(111) terrace-step sites (Fig. 2c). They coincide with the peak for the... 

If the anodic anion transfer (anionic adsorption, Eqn. 9-13a) to form an adsorbed metallic ion complex is the rate-determining step, the Tafel constant, a = 1 - p, win be obtained from Eqn. 9-14. If the anodic transfer of the adsorbed metallic ion complex (desorption of complexes, Eqn. 9-13b) is the rate-determining step, the Tafel constant, a = 2 - p, will be obtained from Eqns. 9-16 and 9-17. Similarly, if the cathodic anion transfer (anionic desorption, Eqn. 9-13a) is determining the rate, the Tafel constant in the cathodic reaction, a = 1 p, will be obtained from Eqns. 9-15 and 9-16 and if the cathodic transfer of a metallic ion complex (adsorption of complexes, Eqn. 9-13b) is determining the rate, the Tafel constant, a-sp, will be obtained from Eqn. 9-18. In this discussion we have assumed Pi = Ps P then, Eqns. 9-19 and 9-20 follow ... 

Anion Desorption Measurements. Reactive scattering by DEA fragment ions in condensed media was first noted in the form of OH electron-stimulated desorption (ESD) yields from O2 embedded in multilayer alkane films [246] and subsequently for aniline physisorbed on top of O2 solids [215]. The anion produced following DEA to N2O has also been observed to react with other N2O molecules within an Ar/N20 matrix to generate a desorbed yield of NO and NO2, among other products. Part of the H2 ESD yield observed from multilayer films of H2O, at incident electron energies below 10 eV, has also been attributed to proton abstraction by fragments produced by DEA, viz., -I- H20 H30 ... 

In early studies of anion desorption from solid 02/hydrocarbon mixtures [246], several observations were made concerning the desorbed signal of OH . (1) The OH yield functions resembled more closely the yield functions for 0 with kinetic energies 1.5 eV from pure O2 films than the signal associated with DEA to the hydrocarbon molecule. (2)... 

Keywords Electrons, DNA, Radiation Damage, Anion Desorption, Dissociative Attachment, Strand... 

In contrast to the yield of SB and base release, the magnitude of anion desorption does not depend very much on the presence of an abasic site in GCAT [90], as seen... 

Residual solution concentrations are greater at 25 compared to 5 C and less at 25 compared to 45 C and both ratios approach unity as the enthalpy becomes less exothermic. Thus, at a given total concentration, a temperature decrease from 25 to 5 C is expected to result in increased adsorption while a temperature increase to 45 C should result in anion desorption. For cation adsorption, the expected concentration ratios are the inverse of those listed since cation adsorption enthalpies are endothermic. 

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