This book provides a comprehensive overview of recently developed, multifunctional materials as visible light-driven catalysts, their mechanisms and applications in solar energy utilisation and conversion. Chapters highlight the use of different approaches such as molecular catalysis, nanomaterials systems, as well as thin-films for solar-driven evolution of renewable fuels, such as hydrogen. This is the first book to give an overview of this area, with chapters specifically interesting for those looking towards industrial applications.