“DSA” is well known in the industry and is often misused as a common noun to indicate insoluble anodes or MMO (Mixed Metal Oxide) anodes. DSA® is a trademark of De Nora associated with a family of products developed by De Nora from the early 60’s to date.

DSA® anodes are titanium anodes coated with proprietary and patented mixed metal oxide compositions comprising different elements such as iridium, ruthenium, platinum, rhodium, tantalum. Thanks to the specific characteristics of coating formulations and techniques, developed by De Nora’s R&D centers and scientists, DSA® anodes can be employed in a wide range of processes, including the long established application in the chlor-alkali industry as well as the most recent utilizations in involving oxygen evolution.

DSA® anodes O2 evolution

Long service life, mechanically stable and fabricated into any shape: De Nora DSA® anodes for oxygen evolution have excellent performances and durability.

DSA® anodes for chlorine evolution

From the chlor-alkali industry to water disinfection and water treatments, De Nora DSA® anodes are the invisible building blocks in thousands of products that make life healthier and more comfortable.


Under construction


Cathode electrodes used in chlor-alkali electrolyzers are usually made of carbon steel in diaphragm cells and nickel in membrane cells. De Nora has developed and introduced to the market different families of cathode coatings that play a key role in chlor-alkali operations.

Gas Diffusion Electrode

When an electrochemical reaction between the liquid and the gaseous phase is required,  our  Gas Diffusion Electrodes (GDE) are the best solution.

De Nora’s Gas Diffusion Electrodes make use of high-surface area supports for metal catalysts, as well as solid inert materials with high gas permeability.

Gas Diffusion Electrodes (GDE)

De Nora’s GDEs are suitable for use in fuel cells, HCl electrolysis and chlor-alkali production.