Fig. 6: Compositional evolution and elemental distribution of CoFe2O4 during OER.
From: 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
a–d 3D atom maps, 2D compositional maps of e–h Fe and i–l O of non-segregated CoFe2O4 nanoparticles in the pristine state and after 100, 500 and 1000 cycles, combined compositional histograms of m Co/Fe ratios and n O/M ratios (M = Co+Fe) in the O-rich nanoregions and the bulk part of non-segregated CoFe2O4 nanoparticles in Supplementary Fig. 19a–d. (Source data of Fig. 6m, n are provided as a Source Data file).
