Extended Data Fig. 5: In situ characterization of coordination environments of 4H-Au@4H-IrPtNiFeCo during the HER and OER.
From: Synthesis of 4H-phase high-entropy alloys for electrocatalysis

a-e, Fourier transformed in situ EXAFS spectra in R space for Ir L3-edge (a), Pt L3-edge (b), Ni K-edge (c), Fe K-edge (d) and Co K-edge (e) of 4H-Au@4H-IrPtNiFeCo NWs at −0.15 V, −0.05 V, OCP, 1.25 V and 1.45 V in N2-saturated 0.5 M H2SO4 electrolyte. Note: M represents metal.