This book presents peer-reviewed articles from the 9th International Conference on Fuel Cell and Hydrogen Technology (ICFCHT 2025) held on 10–11September at Kuala Lumpur in Malaysia, with the theme—“Hydrogen: Path to a Carbon-Free Future: This book provides a comprehensive overview of key innovations driving the global transition to low-carbon energy. This book serves as a timely resource for professionals, researchers, and policymakers engaged in decarbonization and energy transformation. The book addresses the urgent need to replace fossil-based systems with clean, scalable, and integrated solutions. It explores cutting-edge developments in solar photovoltaics, wind power, and bioenergy, alongside emerging hybrid systems and energy storage strategies that enhance reliability and resilience. In the hydrogen domain, it covers the full value chain from green hydrogen production through water electrolysis and photocatalysis, to hydrogen storage, transport, and end-use in industry and mobility. 

Beyond technical performance, the book integrates environmental and economic dimensions, offering lifecycle assessments, circular economy strategies, and techno-economic analyses. It discusses recycling of critical materials, end-of-life management, and design for sustainability, aligning with global efforts to reduce carbon footprints and resource dependency. The final section explores enabling factors such as policy frameworks, digital technologies (e.g., AI and smart grids), risk assessment, and energy access in remote areas. Collectively, these chapters emphasize system-level thinking and cross-sector integration, bridging the gap between innovation and implementation.

This book sets out to solve the challenge of fragmented energy research by providing a unified, interdisciplinary reference. It equips readers with the tools and insights needed to contribute meaningfully to the clean energy transition, making it especially relevant in the context of climate targets, green industrialization, and sustainable development goals.

Prof. Aishah Abdul Jalil obtained her Ph.D. (molecular chemistry) from Hokkaido University, Sapporo, Japan. Her current research focusses on design and synthesis of catalysts and advanced materials for various applications in fine chemistry, photochemistry, electrochemistry, environmental catalysis, wastewater treatment, petrochemical reaction, fuel cell as well as drug delivery system.

Dr. Rafiziana Md. Kasmani is a senior lecturer in the Department of Energy Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia (UTM). She obtained her Ph.D. from the University of Leeds, UK, specializing in vented explosions. The main research focus is on fire engineering, gas and dust explosion by studying a series of methodologies for classifying flame acceleration and potential detonation hazard in chemical process industrial, including mixtures of different sensitivity. 

Dr. Roshafima Binti Rasit Ali is a distinguished academic and researcher at Universiti Teknologi Malaysia (UTM), currently serving as the deputy dean of academic and student affairs at the Malaysia-Japan International Institute of Technology (MJIIT). She is also a faculty member in the Department of Chemical and Environmental Engineering at MJIIT, UTM Kuala Lumpur. Her research expertise encompasses polymer engineering, with a particular focus on biopolymers, bioplastics, and green packaging materials derived from starch and natural fibers. Her work is pivotal in advancing sustainable materials science, aiming to develop environmentally friendly alternatives to conventional plastics. Her research interests include nanomaterials, material characterization, and the synthesis of nanoparticles for applications in smart packaging and environmental remediation.