A German company has signed a memorandum of understanding for a $34bn green energy project in Mauritania.
Egyptian and Emirati firms are also part of the deal.
The facility will produce up to eight million tonnes of green hydrogen and other hydrogen-based products annually in Mauritania.
The first phase is due to be completed in five years' time.
Germany is involved with a number of clean energy projects in Africa as it moves away from dependency on fuel imports from Russia and tries to meet climate targets.