fig5

Figure 5. Transition metal-based electrocatalysts for HER in AEMWE. (A) Schematic showing the fabrication process of Ni@NCW; (B) Chronopotentiometric curves for Ni@NCW under multiple potentials; (C) Chronopotentiometric curve at 4.0 A and the digital image of AEM water electrolyzer utilizing Ni@NCW^[124]. Copyright 2023 John Wiley & Sons; (D) Schematic depicting the HER process on MoO₃/Ni₃Mo in an alkaline environment^[125]. Copyright 2023 American Chemical Society; (E) Polarization curves of AEM water electrolyzer using NiMoO_x@CMK-3 as a cathode; (F) In situ Raman spectra for NiMoO_x@CMK-3 in 1 M KOH^[126]. Copyright 2023 Elsevier; (G) Schemes of various operational modes for AEM seawater electrolyzers^[127]. Copyright 2023 John Wiley & Sons; (H) Chronopotentiometric curve of the AEM water electrolyzer employing WS₂ superstructure as a cathodic catalyst^[129]. Copyright 2024 Springer Nature. AEMWE: Anion exchange membrane water electrolysis; HER: hydrogen evolution reaction; NCW: N-doped carbonized wood; AEM: anion exchange membrane.