Superabsorbent hydrogels for cobalt nanoparticle synthesis and hydrogen production from hydrolysis of sodium boron hydride

▶ In situ Co metal nanoparticle synthesis inside hydrogels. ▶ Hydrogel reactor for hydrogen production. ▶ Environmentally benign hydrogel-Co composites. ▶ Hydrogel-Co for the hydrolysis of NaBH4.