In an important step towards sustainable energy solutions, a recent study published in Energy & Environmental Science reveals progress in the field of green hydrogen production. Led by researchers from the Department of Interface Science at the Fritz Haber Institute (FHI), the study entitled "Role of Fe decoration on the oxygen evolving state of Co3O4 nanocatalysts" uncovers how the addition of iron (Fe) to cobalt oxide (Co3O4) nanocatalysts improves their efficiency and stability in water electrolysis processes.