Dr. Gerasimos Armatas is Professor of Materials Science and Engineering at the University of Crete. His research focuses on semiconducting and porous materials for photocatalysis, electrocatalysis and solar energy conversion, with emphasis on alkaline water electrolysis and hydrogen production. His work integrates nanostructured materials design, interfacial engineering, and operando spectroscopic techniques to elucidate catalytic mechanisms and enhance performance in energy conversion systems.