In article number 2008505, Farid Akhtar and Zhejian Cao design a novel porous strontium chloride (SrCl2) scaffolded by graphene networks as ammonia carriers. The optimized porous SrCl2-reduced graphene oxide (rGO) composite demonstrates extraordinary structural stability and rapid kinetics for ammonia absorption and desorption, offering a robust structure for selective catalytic reduction systems and potential hydrogen storage applications. This work opens a novel view to structure materials having self-expansion and shrinkage properties.