On November 14, Science and Technology Daily reporter learned from Nanjing University of Science and Technology, Professor Zhang Kan University School of Materials through defect-induced epitaxial growth method synthesis of cadmium sulfide, molybdenum sulfide heterostructured photocatalyst to ensure that the system of artificial photosynthesis The high efficiency of hydrogen and the significant cost savings have led to the pace of industrial production of efficient and clean hydrogen energy.
In the process of artificial photosynthesis, the cocatalyst plays a crucial role in the conversion efficiency. In the past, the cocatalyst, which mainly relied on rare metals such as platinum, gold, iridium and rhodium, was highly efficient but not suitable for industrialization Production needs.It is subsequently discovered cheap molybdenum sulfide has similar hydrogen evolution catalytic activity with metal platinum.Therefore, how to improve the catalytic efficiency of molybdenum disulfide conversion is the key to promote this non-platinum artificial photosynthesis.
Zhang Kan and international cooperation team finally achieved the epitaxial growth of cadmium sulfide and molybdenum sulfide heterogeneous photocatalysts by constructing defects on the surface of the molybdenum sulfide nanorods and regulating the synthesis conditions. The heterogeneous photocatalyst reduces the energy loss of charges as they travel between interfaces, with a quantum efficiency near 80% at 420 nm.
