Dr. Abid Ullah is a researcher specializing in protonic ceramic fuel cells (PCFCs) and electrolysis cells (PCECs) at the University of Science and Technology (UST), South Korea. He earned his Ph.D. in Advanced Energy and System Engineering from UST, where his research focused on the design, synthesis, optimization, and degradation analysis of Ba-based perovskite materials for high-performance PCFCs and PCECs. His work covers large-area cell and stack fabrication, interfacial engineering, long-term durability studies, and electrochemical performance enhancement. Dr. Ullah obtained his M.Sc. in Materials for Energy Storage and Conversion through a joint program between the University of Engineering and Technology (UET), Peshawar and Arizona State University (ASU), USA, where he investigated polymer electrolyte membrane (PEM) fuel cells and non-platinum oxygen reduction catalysts. He completed his B.Sc. in Chemical Engineering at UET Lahore, focusing on biomass gasification and alkaline fuel cells. With more than 15 journal papers, 6 conference presentations, and 5 book chapters, Dr. Ullah’s research contributes to the advancement of hydrogen production, fuel cell materials, and sustainable energy technologies. He actively serves as a peer reviewer for several leading journals and is a member of the Electrochemical Society (ECS), Korean Ceramic Society (KCS), and the Korean Hydrogen and New Energy Society (KHNES), dedicated to fostering innovation in clean energy materials and