The Helmholtz Cluster for a sustainable and infrastructure-compatible hydrogen economy (HC H2) is the largest structural change project of the "Structural Strengthening Act for Coal Regions". From basic research to demonstration scale, projects on the topic of chemical hydrogen storage are being developed and implemented. At the same time, partners from research, universities, industry and business are coordinated and networked. The aim is to bring the R&D into application with the help of the partners.