The increasing levels of CO₂ in the atmosphere caused by heavy use of fossil fuels are a big concern. One promising solution to reduce greenhouse emissions is using photo-electrochemistry to convert sunlight, captured CO₂ and water into chemicals for energy storage. In an attempt to mimic the photosynthesis process in the generation of green fuels like hydrogen (H₂), the efforts of researchers have been guided towards the development of a standalone  water splitting system powered by sunlight. However, reaching a high voltage combined with a broadband light absorption limitations is a rather difficult hurdle to overcome. Moreover, most catalysts used for CO₂ conversion produce some undesired products.