The effect of mechanical stress, σ, on electrode potential, E, was studied under zero current conditions. Silver wires in contact with AgNO3 solutions were exposed to tensile stress and the variation of the potential was measured in a two-electrode cell. The change in the steady state, ΔE, was found to be proportional to σ whereas the time dependence, E(t), could be reasonably described by an exponential function. The ΔE vs. σ functions were understood in terms of the electrostatics of the double layer enabling one to evaluate the stress dependence of the potential of zero charge, (∂Eo/∂σ) = 25.6 ± 1 μV MPa-1 this experimental value is supported by a theoretical estimation.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry