The development of automated SFC measurements is described in detail elsewhere. In short, a laser microscope (VK-X250, Keyence) was used in conjunction with an image detection algorithm to extract spot coordinates and geometric surface areas. The coordinates were used for the xy translation of the SFC during HT measurements. The geometric surface area was used to normalize obtained currents. Electrochemical measurements were controlled with a Gamry REF 600 potentiostat. The reference electrode was a doublejunction Ag/AgCl electrode in 3 M KCl (Metrohm). The counter electrode was a glassy carbon rod (SIGRADUR G, HTW). Samples were typically contacted with copper tape at the FTO substrate. Measured potentials, EAg/AgCl, were all corrected to the reversible hydrogen electrode (RHE) scale. The electrolyte was constantly purged with 30 mL min -1 of Ar. The electrolyte flow was regulated using a peristaltic pump (Reglo ICC, Ismatec) set to 15 RPM. The protocol utilized for the initial grid search and MOBOguided experiments is shown in Figure . Each composition was subjected to a galvanostatic protocol starting with a 20 s hold at 1 mA cm -2 , where the activity of the sample is extracted as OER overpotential (ηOER). After performing a short accelerated stress test (AST) of 120 cycles between 0 and 1 mA cm -2 with a 1 s hold each, the activity is assessed again at 1 mA cm -2 . The change in ηOER before and after the AST serves as a proxy metric for stability.