Fig. 3. (A) Potentiodynamic electrodeposition process achieved by successive potential cycles of GR/PAni/PLA template in 6 mmol L⁻¹ PdCl₂ in 0.5 mol L⁻¹ H₂SO₄, measured between 0.019 and 1.31 V. (B) Cyclic voltammogram of the indirect-3D-printed Pd electrode in 0.1 mol L⁻¹ KOH, measured between 0.15 and 1.27 V and (C) in the presence of 0.2 mol L⁻¹ glycerol between 0.35 and 1.29 V. All measurements are performed at 0.05 V s⁻¹. (D) and (E) show representative SEM images, while (F) and (G) show EDS Kα elemental composition maps (indicated in the figure). (H) EDS spectrum of the indirect-3D-printed Pd electrode.