What insights can we learn from dimensionally stable anodes (DSAs)?

The chlor-alkali process is a cornerstone of the chemical industry. The development of dimensionally stable anodes (DSAs) has revolutionized the chlor-alkali industry by significantly improving the efficiency and stability of chlorine production. Originally designed to address the limitations of graphite and platinum anodes, DSAs are composed of titanium substrates coated with mixed metal oxides, such as ruthenium and titanium oxides, which offer superior catalytic stability and corrosion resistance. This perspective explores the historical evolution of DSAs, their intrinsic properties, and performance benefits, emphasizing the pivotal role of the gas-bubble effect in reducing cell voltage and subsequently reducing energy consumption. The development of DSA provides a clear example of how optimizing catalyst composition, refining the preparation process, and managing gas bubble dynamics can significantly enhance the stability and efficiency of industrial electrochemical systems. These critical insights can extend to other important electrochemical processes, such as water electrolysis and fuel cells. This perspective identifies the need for standardized stability testing protocols to enhance the evaluation of catalyst durability.