With the rapid development of Internet technology and nanotechnology, on the one hand, with the quick exchange and integration of information, the transfer of human scientific and technological knowledge and mutual learning has become within reach; on the other hand, the discovery of new materials and the discovery of new applications It is also constantly innovating. The research on unique elements of tungsten, molybdenum and rare earth has undergone earth-shaking changes in recent years, and it has brought new hope to human environmental protection and new energy. Recently, a scientific team working on new electrocatalysts in the United States has found a new material that can be used for catalysis-tungsten disulfide nanosheets. This discovery may become a cheaper platinum metal catalyst in the previous hydrogen conversion technology of seawater hydrogen production technology. And an efficient alternative to catalytic materials.
Sunlight is a clean energy source, but many problems prevent its widespread use. The most important of these is its intermittent nature. It is not always sunny, and sunny periods are not always highly correlated with electricity demand. Besides, if the electricity generated by solar energy cannot be used or stored immediately, it will be wasted. Therefore, there is a need for the practical method to save solar energy, which can be used when needed. These methods enable people to use solar energy and hydrogen energy more efficiently and further reduce their dependence on petroleum.
We use solar energy to electrolyze seawater to produce hydrogen, and the water is decomposed into hydrogen and oxygen molecules through a process called electrolysis. These two gases can be stored and then recombined in the fuel cell to generate electricity when demand is guaranteed. This is one of the main ways people use solar energy at this stage. This is a chemical conversion process that requires a catalyst. Catalysts are the materials that reduce the energy needed for chemical reactions. Electrocatalysts use electricity to drive chemical reactions and are the key to producing hydrogen from seawater. The electrolysis of seawater to produce hydrogen has been around for a long time. Still, it requires a large amount of electricity and expensive catalysts, resulting in high costs and popularity. The principal value of this is the precious metal catalyst-platinum. In most hydrogen conversions, platinum metal is recognized as having the best catalytic effect. But platinum is so expensive, so people need to find cheap and efficient catalytic materials to break through the cost bottleneck of seawater hydrogen production technology.
A scientific team from the United States that is working on a new electrocatalyst has found a new material that can be used for catalysis-tungsten disulfide nanosheets, a two-dimensional material similar to graphene whose structure is a close-packed hexagonal layered structure. The crystal is composed of three planes of SWS, the distance between each S atom in the layer and the surrounding S W atoms is equal, and each W atom forms a prism coordination structure with the neighbouring 6 sulfur atoms, creating a hexagonal body as a whole The layered crystal structure has excellent electrical characteristics.