High-throughput discovery of hydrogen evolution electrocatalysts in the complex solid solution system Co–Cr–Fe–Mo–Ni

Sabrina Baha, Ruhr Universität Bochum , Bochum, Germany

Water electrolysis is a key technology that will contribute significantly to the decarbonization of industry by providing access to green hydrogen. Further development of water electrolysis requires the discovery of new sustainable catalyst materials that reduce the energy consumption for the hydrogen evolution reaction (HER). One of these materials could be transition metals, which are individually less active for HER but can become comparable to commercial catalysts as Compositional Complex Solid Solutions (CCSS) or also named as High Entropy Alloys (HEAs). However, the discovery of new electrocatalysts requires a solution, for example, combinatorial synthesis and high-throughput screening techniques to explore the wide compositional range of CCSS.

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