Voltammetric studies of colloidal particle monolayer on a gold rotating disk electrode

► Ion transport through a layer of micron-size colloidal particles. ► Cyclic voltammetry and rotating disk electrode for porous layer characterization. ► We measure the limiting diffusion current at various surface coverage of the disk. ► We present an equation for the limiting diffusion current through the particle layer. ► The experimental results agree well with our theoretical predictions.