Title: THE TEMPERATURE COEFFICIENT OF THE POTENTIAL OF ZERO CHARGE OF Ag SINGLE CRYSTAL FACE ELECTRODES IN AQUEOUS ELECTROLYTE SOLUTION
Author(s): L.M.Doubova (CNR-IPELP, Corso Stati Uniti 4, Camin (Padua), Italy), S.Trasatti (Department of Physical Chemistry and Electrochemistry, University of Milan, Via Venezian 21, 20133 Milan, Italy; Fax +39.02.26603-224; E-mail trasatti@icil64.cilea.it}

The temperature coefficient of the potential of zero charge of Ag single crystal electrodes, $\d E_{\sigma = 0}/\d T$, was measured by recording capacitance curves at different temperatures. Two experimental approaches were adopted: the ``continuity'' and the ``discontinuity'' method, consisting in recording curves at different temperatures without and with extraction of the electrode from the solution, respectively. Appreciable differences have been observed. The origin of the differences and their significance are discussed in terms of keeping the appropriate conditions for the electrode/solution interface during the experiments.

Key words: silver, single crystal electrode, potential of zero charge, effect of temperature, work function, electrical double layer
PACS: 73.50.Lw, 73.40.Ns, 82.45.Fk