Mechanisms of reactions at solid-liquid interfaces
+ and the rate constant is quantified for the first time. The aforementioned spectroelectrochemical channel cell was then adopted to scrutinise the reactive dyeing kinetics on a cotton fabric. Kinetic results showed that the dye adsorption to the fabric is controlled by a solid-liquid interfacial reaction which is first order with respect to the surface concentration of the dye. However, the rate of this process is governed by the availability of the reaction sites for adsorption of dye molecules onto the fabric surface. It was demonstrated that the presence of supporting electrolyte in high pH media, and mercerisation pretreatment of the fabric, are essential to increase the dye uptake rate. Ex situ AFM studies suggested that mercerisation leads to a disordered fibre surface which may be responsible for the enhanced dye absorption rate.