Powder Metallurgy: An Efficient and Scalable Production Process of Electrodes for the Gigawatt Electrolysis Industry

In this contribution a powder metallurgical (PM) production process is outlined to produce highly active electrodes for the alkaline water electrolysis. Different catalytic coatings were produced on porous substrates, including foams. The electrochemical activity of the electrodes towards the hydrogen (HER) and oxygen evolution reaction (OER) were analyzed considering technical conditions. It can be shown that the performance of the catalysts can significantly be improved by adjusting the chemical composition and the catalytic loading. Furthermore, the catalytic coating obtained by the PM production route exhibits an excellent mechanical stability on different substrates.