An ever so intense effort aimed at a green transition to mitigate the effects of anthropic climate change is undergoing worldwide. The path is long though, and presents complex issues, one of them being the strong dependency on fossil fuels of various key sectors of the current society such as electricity and heat production, transport and industries. In this context, the production of renewable fuels, and more specifically solar fuels, is considered extremely promising by the scientific community. The most exploited way to obtain solar fuels as of now is to employ electrolysers to split H2O and CO2 molecules, reducing them to a mixture of H2 and CO, which is called a syngas and can be exploited both as fuel and as platform for the synthesis of more complex hydrocarbons.