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.

Developing efficient platinum-based electrocatalysts with super durability for the oxygen reduction reaction (ORR) is highly desirable to promote the large-scale commercialization of fuel cells. Although progress has been made in this aspect, the electrochemical kinetics and stability of platinum-based catalysts are still far from the requirements of the practical applications. Herein, PtPdFeCoNi high-entropy alloy (HEA) nanoparticles were demonstrated via a high-temperature injection method. PtPdFeCoNi HEA nanocatalyst exhibits outstanding catalytic activity and stability towards ORR due to the high entropy, lattice distortion, and sluggish diffusion effects of HEA, and the HEA nanoparticles delivered a mass activity of 1.23 A/mg_Pt and a specific activity of 1.80 mA/cm_Pt², which enhanced by 6.2 and 4.9 times, respectively, compared with the values of the commercial Pt/C catalyst. More importantly, the high durability of PtPdFeCoNi HEA/C was evidenced by only 6 mV negative-shifted half-wave potential after 50,000 cycles of accelerated durability test (ADT).