Semiconductor Quantum Dots/Photocatalysts Architecture for the Photoelectrochemical Conversion of Biomass and Water into Hydrogen

Harnessing of solar energy to power our everyday living is an ultimate goal in sustainable living of modern mankind. This can be potentially achieved through the conversion of sunlight to chemical fuel, electricity and heat. In this proposal, we seek to develop a composite photoelectrochemical system consisting of semiconductor quantum dots (QDs)/photocatalyst electrodes that is purpose-designed to convert solar energy to hydrogen fuel (from water splitting). The interfacing of QDs with wide bandgap photocatalysts through band engineering and heterojunction architecture is crucial in determining the overall efficiency of the system. We will also investigate the potential of incorporating biomass (another form of renewable energy resource) in enhancing the overall efficiency of the photoelectrochemical system. In such case, studies of the surface reactive sites and redox mechanism will be carried out in parallel to the photoelectrode design to provide a holistic understanding of the system. The fundamental knowhow and prototypes developed through this project will serve as important enabling precursors for far more substantial achievements in this vital research direction.