This mini-review explores recent advancements in nanostructured solutions that support the sustainable production and storage of green hydrogen, a clean and efficient fuel that is garnering global attention in the transition to carbon-neutral energy. The development and integration of advanced nanomaterials, particularly those based on nickel, cobalt, and molybdenum composites, are emphasized for their capacity to enhance catalytic activity, electrical conductivity, and surface reactivity in electrochemical water splitting, thereby addressing the pressing need for scalable hydrogen production. The review details significant improvements in hydrogen storage, with a focus on cutting-edge metal-organic frameworks (MOFs), carbon-based nanostructures such as Fe- and Au-doped carbon nanotubes (demonstrating up to 6.92 wt% storage at near-ambient conditions), and hybrid systems that now achieve practical capacity benchmarks and improved cycling performance. By systematically analyzing current limitations in material durability, cost, and synthesis scalability, this mini-review outlines realistic pathways for integrating nanostructured materials into commercial green hydrogen systems and assesses the environmental and economic impacts, highlighting their transformative potential for a sustainable, carbon-neutral energy future.