STEM images of Ir atoms in Ir(C2H4)2/MgO with varying Ir loadings (in wt %): (A,D), 1.0; (B,E), 0.05; (C,F), 0.01, shown on various MgO faces: (A−C) unidentified and (D−F) (100).

ACS Catal. 2018, 8, 3489−3498