First and Second Voltammetric Cycles

The open-circuit potential (OCP) recorded immediately after bringing in contact the C0-c(4x2)/Ni(lll) specimen with the 0.1 M KOH electrolyte was found to be about 0.24 V vs DHE (The electrode potential of Che DHE in 0.1 M KOH vs Reversible Hydrogen Electrode (RHE) was calculated to be 0.06 V. All of the electrode potentials in this thesis are cited vs DHE)) drifting rapidly over about 2 minutes to a fairly stable value of 0,20 V. This behavior was found to be very reproducible, yielding for 

With the exception of the unique peaks associated with CO 

In fact, excursions of about 60 mV in the positive range were found Co lead to an increase in the anodic and cathodic charge of 

From a quantitative viewpoint, however, the data obtained in this work appear to be significantly different than chose published in the literature. Specifically  

Ni(lll), corresponds to about 4.0 electrons per nickel surface atom. This value is substantially smaller chan that reported by Beden et al. who estimated that four to five monolayers of (presumably divalent) nickel hydroxide were formed just prior to che onset of the redox-peak based on voltammetric measurements conducted at 0.05 V.s According to Ariva and coworkers plots of log(ig p versus log(v), where i, represents the current obtained in the plateau region during che first scan in the anodic direction and i/ is the potential scan rate, are linear over the range 10 u 200 mV.s Therefore the much larger charge observed by Beden et al. cannot be attributed to differences 

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