Hydrogen is a key element in the transition towards sustainable energy systems, and 'green' hydrogen produced through electrolysis using renewable energy sources is gaining momentum. In a recent research study published in Angewandte Chemie, Dr. Prashanth Menezes and his team have made a significant breakthrough in the field of hydrogen production by exploring the use of nickel-based clathrates as catalysts for the oxygen evolution reaction (OER) in electrolysis. The study focused on Ba8Ni6Ge40 clathrates, revealing their superior efficiency and stability compared to conventional nickel catalysts. Clathrates, known for their complex crystalline structure, exhibited a unique behavior under the influence of an electric field. The dissolution of germanium and barium atoms from the clathrate matrix resulted in the formation of highly porous nickel nanolayers with a significantly increased surface area. This structural transformation maximized the exposure of catalytically active nickel centers to the electrolyte, leading to enhanced OER performance. The experimental investigations conducted at BESSY II and German universities provided valuable insights into the mechanism behind the exceptional catalytic activity of nickel clathrates. The team's findings not only showcased the potential of Ba8Ni6Ge40 clathrates but also opened up possibilities for exploring other transition metal clathrates as efficient electrocatalysts. Overall, this research paves the way for the development of next-generation catalysts for hydrogen production, offering a sustainable and economically viable solution for the growing demand for 'green' hydrogen in various industries.