Table 2 Average O/M ratios in Co2FeO4 and CoFe2O4 nanoparticles during OER calculated by the total number of O and (Co+Fe) counts in all analysed datasets.
From: 3D atomic-scale imaging of mixed Co-Fe spinel oxide nanoparticles during oxygen evolution reaction
Co2FeO4 | CoFe2O4 | |||||
|---|---|---|---|---|---|---|
Segregated | Non-segregated | |||||
O/M | Fe-rich nanodomains | Co-rich nanodomains | Bulk | O-rich regions | Bulk | O-rich regions |
Pristine | 1.2 ± 0.1 | 1.3 ± 0.1 | 1.1 ± 0.1 | − | 1.2 ± 0.1 | − |
100 cycles | 1.3 ± 0.1 | 1.4 ± 0.1 | 1.2 ± 0.1 | 1.4 ± 0.1 | 1.2 ± 0.1 | − |
500 cycles | 1.3 ± 0.1 | 1.4 ± 0.1 | 1.2 ± 0.1 | 1.5 ± 0.1 | 1.3 ± 0.1 | 1.7 ± 0.1 |
1000 cycles | 1.5 ± 0.1 | 1.6 ± 0.1 | 1.3 ± 0.1 | 1.8 ± 0.1 | 1.3 ± 0.1 | 1.8 ± 0.1 |
