## surface electric potential

https://doi.org/10.1351/goldbook.S06170
Given by $\chi ^{\beta} = \mathit{\Phi }^{\beta} - \psi ^{\beta}$ where $$\psi ^{\beta }$$ and $$\mathit{\Phi} ^{\beta}$$ are the outer and inner electric potentials of phase β, respectively.
Sources:
Green Book, 2nd ed., p. 59 [Terms] [Book]
PAC, 1974, 37, 499. (Electrochemical nomenclature) on page 506 [Terms] [Paper]