Earth’s global average temperature has been rising since the industrial period, and the anthropogenic emissions of greenhouse gases, carbon dioxide especially, have been widely recognized as the main cause. The energy sector is a main contributor of emissions. As the energy demand is expected to grow in the near future, new pathways to produce energy are needed. A path to meet part of the energy demand using renewable energy as the primary source, but without eliminating fuels and the devices that require them, is the use of solar fuels. A solar fuel is similar to fossil fuels in terms of properties, but is produced from solar energy and simple molecules like carbon dioxide and water, and not extracted from underground deposits.