Prof. Dr. Sotiris Sotiropoulos has more than 30 years of experience in electrochemistry. He received his BSc in Chemistry (Aristotle University) in 1989 and his PhD in Electrochemistry (Southampton University) in 1994. Following postdoctoral periods in Cambridge, UK, and Johns Hopkins, USA, he was appointed a Lecturer at Nottingham University, UK (1996–2000), and from 2000, he moved to Aristotle University, Greece, where he is now a Professor of Electrochemistry. His research interests include the preparation and characterization of electrocatalysts and photo-electrocatalysts; microelectrodes; sensor materials and designs; electrocatalysis (for fuel cell-related reactions and hydrogen production); and photoelectrocatalysis for environmental applications, AFM and, SECM. He has been an Editor and is currently a Special Issue Editor for Electrochimica Acta (Elsevier).