Hydrogen is considered to be one of the future alternative energy sources. However, so far, expensive and energy-intensive production processes have been a major problem hindering the large-scale application of this substance. For this reason, more and more scientists around the world are studying other methods of producing hydrogen: for example, producing hydrogen from algae. Scientists at Friedrich Schiller University in Germany, the Leibniz Institute for Photonics Technology (Leibniz IPHT), and Ulm University got inspiration for hydrogen production from nature. In order to do this, the team from the "CataLight" collaborative research center of the University of Jena and Ulm has combined new organic dyes with non-precious metal catalyst molecules, which are released in water when light is irradiated Gaseous hydrogen . They wrote in a research report published in the European "Chemistry" magazine that this alternative has shown its advantages in terms of lifetime and effectiveness after being excited by visible light. 　　Inspired by photosynthesis In nature, sunlight effectively stores energy in chemical bonds through photosynthesis, because the light-gathering and reactive complexes in the thylakoid membrane are fixed in the chloroplast. Researchers led by Professor Felix Schacher achieved this type of arrangement with the help of polymers that interact with hydrophilic and hydrophobic substances. These charged so-called graft copolymers are artificially produced. So far, scientists have mainly relied on precious metal complexes as light-absorbing materials for artificial photosynthesis. However, Professor Kalina Peneva's research team is working on metal-free dyes. Researchers in Jena are focusing on rylene dyes, which are particularly stable in light and chemical processes. "The light-absorbing metal complexes used in research usually contain ruthenium or iridium," Peneva explained. "However, these metals only account for less than one millionth of the mass of the earth's crust, so the development potential is limited. She said that the use of organic, chemical-based photosensitive compounds is more sustainable than the use of heavy metals. Interdisciplinary cooperation to solve future problems But it is not enough to complete light absorption. The researchers say that in order to form hydrogen, the energy levels of the dye and catalyst molecules after absorption must be precisely matched. To determine these energy levels, researchers from Professor Benjamin Dietzek's team used spectroscopy. This allows them to obtain the amount of energy absorbed in the molecule, which comes from the interaction of matter with specific light. In addition to the growth of knowledge, scientists say that future problems can be most effectively solved through interdisciplinary cooperation, and this trend has become increasingly clear. "This is because in this research project, in addition to organic chemists and polymer researchers, physical chemists from Leibniz IPHT, inorganic chemists and chemical engineers from Ulm University also provided valuable contributions. And insights." (Original from: Global Energy Global Hydrogen Energy Network, China New Energy Network) Eggcrate Grille,Egg Crate Grilles,Egg Crate Return Grille,Aluminum Egg Crate Grille Guangzhou Jointair Co., Ltd. , http://www.jointairaccessories.com