From June 19th to 21st, 2023, the second interdisciplinary Summer School of the alliance for sustainability of the 16 universities in North Rhine-Westphalia - HumboldtN - will take place at RWTH Aachen University with the participation of FZ Jülich as part of the Jülich Aachen Research Alliance (JARA). The School focuses on the "Hydrogen Innovation Ecosystem" from an interdisciplinary perspective. Different stages of the value chain of a hydrogen economy will be considered in keynote lectures from science and practice. By taking up innovative approaches of transformation research in the energy sector and embedding sustainability aspects in research activities, new impulses are to be set. Post-Docs and advanced PhD students of all subjects from universities and non-university research institutions in NRW who would like to deal with the content of the "Hydrogen Innovation Ecosystem" in an interdisciplinary way and with reference to the SDGs are invited to participate in the School.