Catalysts made of molybdenum sulphides have been used for the desulphurisation of oil since World War II. Now, Jakob Kibsgaard and Prof. Besenbacher, however, has revealed promising results to produce hydrogen from water by means of nanoparticles of Mo3S13 in a collaboration between iNANO and Stanford. What is so smart about Mo3S13 is that it can be produced cheaply and easily.