ABSTRACT
Most strategies for obtaining a value for the absolute SHE potential, dened as the potential of the SHE reaction relative to gaseous e-, involve a thermodynamic cycle that directly relates the absolute standard Gibbs free energy of the SHE reaction, ΔGabs°(SHE) or ΔGabs°ʹ(SHE), to either the “real” proton hydration free energy, αaq°(H+), or the absolute proton hydration Gibbs free energy, ΔGaq°(H+), and the ionization and atomization energies of H(g) and ½H2(g), respectively, by Equations 1.1 or 1.2.
