 Hybrid water electrolysis is a promising technology for the production of hydrogen from renewable sources such as solar and wind power. However, there are several challenges associated with its implementation, including the need for high-performance catalysts, the potential for contamination by impurities, and the difficulty of achieving the necessary levels of activity and selectivity. These challenges must be addressed before the technology can be used commercially. This article was authored by Tilk Hallstorf, J. Nicholas Hausmann, Tobias Sondheimer, and others.