fig7
![Recent advances in earth-abundant first-row transition metal (Fe, Co and Ni)-based electrocatalysts for the oxygen evolution reaction](https://image.oaes.cc/92b7fbf7-13f1-4589-b2f9-a2999bf9db55/5063.fig.7.jpg)
Figure 7. (A) Schematic of the synthesis process of A-CoS4.6O0.6 PNCs. (B) Schematic of oxygen-containing amorphous cobalt sulfide porous nanocubes with Co-S dangling bands, a distorted CoS4.6O0.6 octahedral structure and incorporated oxygen in the CoSx (vac = vacancy, Co = blue, S = yellow, O = red and H = white). Reproduced with permission. Copyright 2017, Wiley[95].