Analysis of Temperature Effects Based on Gibbs Thermodynamics

ANALYSIS OF TEMPERATURE EFFECTS BASED ON GIBBS THERMODYNAMICS 

As demonstrated in the previous Section, temperature effects on platinum] solution interphases can be rigorously characterized through the evaluation of the entropies of formation of the interphase and double-layer. Moreover, these results can be employed to obtain an independent evaluation of the entropy of charge-transfer adsorbed species. 

The approach employing Gibbs thermodynamics presents some advantages with respect to the method of analysis that employs a generalized isotherm  

Nevertheless, the method of analysis proposed in this Section also has its limitations  

In the following, the application of this method of analysis will be illustrated for the case of Pt(l 11) in 0.1 M HCIO4 solutiom First, the evaluation of the entropies of formation of the interphase, double-layer and the interfacial water network will be described in Sections IV. 1, IV.2 and IV.3, respectively. Then, these results will be employed to evaluate the absolute molar entropy of adsorbed hydrogen and OH on Pt(lll), in Section IV.4. Finally, these results will be critically compared with those obtained with a generalized isotherm in Section IV.5. 

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IV. ANALYSIS OF TEMPERATURE EFFECTS BASED ON GIBBS THERMODYNAMICS... 

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