A Comparative Study of Unpolarizable and Polarizable Metal-Solution Systems

Abstract

The properties of the metal-solution potentials of nickel in nickel free hydroxide and phosphate solutions are compared with the properties of unpolarizable electrodes and with the properties of polarizable metal-solution systems. The electrochemical equilibria of unpolarizable systems are analyzed in terms of transfer mechanisms between the phases present. In the absence of any electrochemical equilibria, the metal-solution potentials are interpreted as adsorption potentials. Chemisorption in the inner Helmholtz layer is discussed in connection with ``reversibility'' and polarizability of the system.

Electrode Potentials in Fused Systems. I. Sodium Hydroxide

“…Virtually no work of this kind has been reported in the literature although several workers have studied foreign ion cells in aqueous solutions. [4][5][6][7][8] The work of MacGillavry and co-workers on the potential of nickel in foreign ion solutions, including aqueous sodium hydroxide, is of interest and will be referred to later. Lux has studied reactions in various melts, particularly on the addition of oxides to a K2SO4-LÍ2SO4 eutectic at 950°.9 He found that gold electrodes could be used to follow the progress of a reaction by measuring the change in potential between a reference and an indicator electrode.…”