Grain-resolved mapping of oxygen evolution activation on a Ni-superalloyDonik, Črtomir (Avtor) Suhadolnik, Luka (Avtor) Tomc, Blaž (Avtor) Voronkin, Anton (Avtor) Ustarroz, Jon (Avtor) Bele, Marjan (Avtor) Godec, Matjaž (Avtor) Hodnik, Nejc (Avtor) Ni-superalloyIL-SEMIL-EDSSECCMWe report the first grain-resolved mapping of oxygen evolution reaction (OER) activation on a Ni-based superalloy using identicallocation EBSD, complemented by IL-SEM, IL-EDS, and SECCM. NiFe (oxy)hydroxide film formation and OER activity are strongly influenced by grain size and orientation, with (111)-oriented and smaller grains showing the highest activity. These findings reveal pronounced microstructure heterogeneity and establish IL-EBSD as a powerful tool for guiding the design of advanced electrocatalysts.Royal Society of Chemistry20252025-10-10 11:55:28Neznano23842UDK: 54ISSN pri članku: 1364-548XDOI: 10.1039/D5CC02703ACOBISS_ID: 245668099Združeno kraljestvo Velike Britanije in Irskesl© The Royal Society of Chemistry 2025