Abstract
Hydrogen is expected to play a key role in future clean energy technology as an energy vector. It could be produced in a sustainable manner via water electrolysis powered by renewable energy sources. The widespread application of this technology, however, is hindered by several factors, with a prominent bottleneck in the scale-up of hydrogen production represented by the reliance on rare and expensive catalysts based on platinum-group metals (PGMs). Consequently, enormous research effort is directed at the reduction or even replacement of these Critical Raw Materials in the catalysts. Herein, we highlight selected examples of the PGM reduction and replacement strategies, with a focus on nanostructuring, as well as on our contribution in the field of transition metal phosphides and borides.
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