A team from the University of Trento's Department of Physics has delved into the realm of two-dimensional materials to explore their potential in generating hydrogen sustainably. Their research, recently published in the journal Carbon, focuses on using ultra-thin structures like graphitic carbon nitride (g-C3N4) in photoelectrochemical cells for hydrogen production. This approach, akin to artificial photosynthesis, utilizes sunlight and water to create hydrogen without the use of fossil fuels or high-temperature processes. The team's study unveils the exceptional efficiency of single-layer g-C3N4 in splitting water molecules and releasing hydrogen, surpassing traditional configurations. The researchers discovered a unique excitonic dispersion in the material, shedding light on how electrons and atoms interact, fundamentally reshaping our understanding of semiconductor behavior. Notably, the project's objective is to leverage this knowledge to identify more effective catalysts for green hydrogen production, contributing to the ongoing shift towards sustainable energy solutions. The work, part of the H2@Tn initiative, not only propels advancements in renewable energy research but also solidifies Trento's reputation as a key player in the quest for energy sustainability.