Anodic Electrocatalytic Coatings for Electrolytic Chlorine Production: A Review

Abstract Industrial chlor-alkali electrolysis represents one of the most energy- and resource-intensive technological applications of electrocatalysis. Improving process efficiency becomes a critical issue for the sustainable development and for alleviating the energy and environmental crisis. Rational design in the morphology of RuO 2 -based anodic electrocatalytic coatings and the control in the coating microstructure can contribute to massive energy saving compared to the current commercial Ru 0.3 Ti 0.7 O 2 coating. This review covers recent developments in the anodic coatings. Performance enhancement for RuO 2 -based anodic coatings is achieved by using alternative preparation routes of sol-gel and electrodeposition. The target control in the coating surface morphologies and the increase in the utilization of active Ru species are demonstrated.