fig6

Figure 6. (A) Schematic illustration of the synthesis of WS₂/Co_1-xS@N/S-codoped carbon nanocomposite. (B) SEM and (C) TEM images of 20WZ-1000, (D) HER polarization curves of benchmark catalyst 20% Pt/C, and (E) OER polarization curves of benchmark catalysts IrO₂, carbonized/sulfurized W20@Z67 and ZIF-67 under 600, 800 and 1,000 °C. (A-E) Reproduced with permission from^[89]. Copyright 2020, Elsevier Ltd. (F) Synthetic scheme, and (G)TEM image of PW-NiCo-NC. (H) Schematic illustration of the EWS device. (F-H) Reproduced with permission from^[90]. Copyright 2023, Wiley-VCH GmbH.