Modern Aspects of Electrochemistry, Volume 31 by John O'M. Bockris, Ralph E. White, Brian E. Conway

By John O'M. Bockris, Ralph E. White, Brian E. Conway

This is often the most recent quantity of the sequence praised by means of JACS for its "high standards," and through Chemistry and for rendering a "valuable service." specialists from educational and commercial laboratories around the globe current: -- Experimental effects from the decade of interfacial reports -- a shocking quantum mechanical therapy of electrode approaches -- contemporary paintings in molecular dynamic simulations, which confirms a few prior modelistic methods and in addition breaks new floor -- An in-depth examine underpotential deposition on unmarried crystal metals, and -- the sensible subject of automatic corrosion size.

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By John O'M. Bockris, Ralph E. White, Brian E. Conway

This is often the most recent quantity of the sequence praised by means of JACS for its "high standards," and through Chemistry and for rendering a "valuable service." specialists from educational and commercial laboratories around the globe current: -- Experimental effects from the decade of interfacial reports -- a shocking quantum mechanical therapy of electrode approaches -- contemporary paintings in molecular dynamic simulations, which confirms a few prior modelistic methods and in addition breaks new floor -- An in-depth examine underpotential deposition on unmarried crystal metals, and -- the sensible subject of automatic corrosion size.

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The first method is used with rough electrodes and compounds labeled with emitters of low energies. It is somewhat more accurate and easier to use than the second one. However, the electrodelowering method has the great advantage of being suitable for smooth electrodes, including monocrystals, and can be used with high-energy emitters. 106 The adsorption of water on a platinum electrode was studied on rough Pt electrodes from nonaqueous solutions. It was shown that the interaction of water with the electrode depends on the nature of the solvent.

Propylene carbonate (PC) weakly interacts with a platinum surface. 109 Conversely, even a small amount of water added to a tetrabutylammonium perchlorate solution in anhydrous PC markedly changes the voltammetric curve. Radiometric measurements with tritium-labeled water show that the adsorption is a reversible process and only slightly depends on the electrode potential. As follows from these data, water exhibits higher affinity to the platinum electrode than PC and even at low concentration in the bulk, it can displace the PC molecules from the electrode surface.

A comparison of data obtained for different metals but the same adsorbate and the same solvent (constant energy of the adsorbate–solvent interaction) allows one to create a hydrophilicity scale. The chosen adsorbate should be neutral and should not react chemically with the electrode surface. Aliphatic compounds, especially alcohols, are the most suitable adsorbates. Alcohols adsorb on metals with their hydrocarbon tail toward the electrode and the functional group surrounded by the hydrophilic liquid phase.

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