While it is possible to analytically find a general solution for any number of steps, we limit ourselves for simplicity to an exemplary two-step reaction (Eqs. 14a-b). Assuming 𝛼 = 0.5 yields Eq. 24a. This equation describes the volcano relationship for the micropolarization exchange current density, taking into consideration the varying concentration of intermediates with binding energy. The peak of the Volcano would then be found according to Eq. 24b. Similar expression for the HOR/HER using Langmuir isotherms are known . When the factor 𝑐 is included, the flanks of the Volcano can indeed be described by Eq. 22 (Eq. 24c). )