Conference paper

The Surface Potential of Water at Metal-Solution Interfaces

Achille De Battisti ; Laboratory of Electrochemistry, the University, Via Venezian 21, 20133 Milan, Italy
Sergio Trasatti ; Laboratory of Electrochemistry, the University, Via Venezian 21, 20133 Milan, Italy

Abstract

Relative values of the surface poitential of water at metal-
aqueous solution interfaces at the potential of zero charge are
derived by comparing experimental charge-potential curves for
various metals. The principle of the method is presented and discussed.
Absolute values for all the othe1r mefa~s are obtamed by
estimating the absolute value of the surface potential of water on
Hg. Three indeipendent routes are suggested. They are described
and discussed. Experimental results are presented. The final estima:
te sugigests that the surface potential of water on Hg is between
0.07 a1D.d 0.08 V, probably closer to 0.07 V. Water molecules are
oriented wUh the oxy,gen atom facing the solid for all the metals
investigated. A model is proposed to explaiin the metal-dep'endent
orientation of water at the 1nterface with electrodes at the potential
of ze1ro charge.

Keywords

Hrčak ID:

196449

URI

https://hrcak.srce.hr/196449

Publication date:

22.12.1976.

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