fig5

Figure 5. (A) Synthesis process and the coordination environment of single Rh atom on metal nodes of PCN. (B) LSV curves of various catalysts in 0.5 M H₂SO₄ at 1,600 rpm. Inset: HAADF-STEM images of PCN-Rh15.9. (C) Comparative analysis of overpotentials at 10 mA cm^-2 and Tafel slopes of PCN-Rh15.9/KB with different reported HER catalysts, (A-C) are reproduced from Ref.^[100]. with permission, Copyright 2023, Wiley. (D) DFT-optimized atomic models depicting the geometry of each catalyst configuration. (E) LSV curves of Rh-TiO₂/CNF, TiO₂/CNF, Pt/C, and CNF. (D and E) are reproduced from Ref.^[40]. with permission, Copyright 2024, Wiley. (F) Electrocatalytic HER performance in alkaline medium (1.0 M KOH): iR-compensated LSV curves for Ni_xMoO_y nanorod arrays (NRs), Rh SAs-Mo₂C NSs, Mo₂C/3D-NRs, Rh SAs-Mo₂C/3D-NRs, and Pt/C. Reproduced from Ref.^[73]. with permission, Copyright 2023, Wiley.