HM coatings can affect the kinetics of redox processes by impacting the mass transfer of redox species, altering the surface chemistry and wettability of the electrode. In addition, the equilibrium concentration of redox species within hydrogel membranes, covering electrodes, may differ from the bulk electrolyte. Here, we have selected different polysaccharide hydrogels to tailor the ionic transport within the diffusion layer and determine their influence on the kinetics of the redox processes, choosing representatives of cationic (CS), anionic (Alg)