i0_AlCoCe ipass_AlCoCe(pH)/(1-abs(ipass_AlCoCe(pH)/idl_AlCoCe)) "Exchange current density for O2 reduction reaction at AlCoCe" i0_AA2024 ipass_AA2024(pH)/(1-abs(ipass_AA2024(pH)/idl_AA2024)) "Exchange current density for O2 reduction reaction at AA2024" pH -log10(cH/1000[mol/m^3]) "pH of the electrolyte"