This paper presents the results of electrochemical investigations of the Ce(III)/Ce(IV) couple, for use in a SO2/NOx abatement process. A voltammetric study was conducted at a platinum rotating disc electrode for the conditions corresponding to the gas scrubbing processes. The charge transfer coefficients were weakly affected by increasing the concentration of sulfuric acid up to 5 M. Conversely, the diffusion coefficients and the rate constants were decreasing functions of the concentration of sulfuric acid. The electrochemical regeneration of Ce(IV) was also studied at a platinized titanium surface and the oxidation appeared to be linked to other oxidative processes such as O-2 formation. Batch experiments, carried out in a filter press cell, showed good faradaic yields even in the potential domain corresponding to significant background current attributable to the supporting electrolyte.