Oxygen Evolution Reaction For green hydrogen production, the development of highly active and durable electrode materials that function the under the intermittent power supply of renewable energies is necessary. In article number 2204403, Byung-Hyun Kim, MinJoong Kim, Hyun-Seok Cho, and co-workers propose the rational design of a stable iron-rich nickel-iron layered double hydroxide under dynamic operating conditions for the alkaline oxygen evolution reaction. Its practical feasibility for industrially relevant application in water electroyzers is demonstrated.