Scientists from Tomsk University of Technology, Prague University of Chemistry and Technology and Jan Evangelista Purkyne University on the Rabe River jointly developed a new two-dimensional material to produce hydrogen, which is the basis for alternative energy. The material efficiently generates hydrogen molecules from fresh water, salt water and polluted water by exposure to sunlight. The results were published on "ACS Applied Materials & Interfaces".
"Hydrogen is an alternative energy source. Therefore, the development of hydrogen technology can be a solution to global energy challenges. However, there are still some problems that need to be solved. In particular, scientists are still looking for efficient and green hydrogen production methods. One of them The main method is to decompose water by exposure to sunlight. There is a lot of water on our planet, but there are only a few methods that are suitable for salt water or polluted water. In addition, few people use infrared spectroscopy, which accounts for 43% of all sunlight," the author One, pointed out Olga Guselnikova, a researcher at the TPU School of Chemistry and Applied Biomedical Sciences.
The developed material is a three-layer structure with a thickness of 1 micron. The lower layer is a thin film of gold, the second layer is made of 10 nanometer platinum, and the third layer is a metal organic frame film of chromium compounds and organic molecules.
"During the experiment, we added water to the material, sealed the container, and collected periodic gas samples to determine the content of hydrogen. Infrared rays caused proton resonance excitation on the sample surface. Thermionic electrons generated on the gold film were transferred to the platinum layer. These electrons initiate the reduction of protons at the interface with the organic layer. If the electrons reach the catalytic center of the metal-organic framework, the latter is also used to reduce protons and obtain hydrogen." Guselnikova explained.
Experiments have proved that a material of 100 square centimeters can produce 0.5 liters of hydrogen in one hour. This is one of the highest rate records for two-dimensional materials.
"In this case, the metal organic framework also acts as a filter. It can filter impurities and pass the purified water without impurities to the metal layer. This is very important, because although there is a lot of water on the earth , But its main volume is salt or polluted water. Therefore, we should be prepared to deal with this water." She pointed out.
In the future, scientists hope to improve this material to make it effective for both infrared and visible light spectra.
"This material has shown a certain absorption capacity in the visible light spectrum, but its efficiency is slightly lower than that of the infrared spectrum. After improvement, it can be said that the material can play an effect on 93% of the spectrum of sunlight." Guselnikova added .
Glass ceramics are widely used in machinery manufacturing, optics, electronics and microelectronics, aerospace, chemical, industrial, biomedical and construction. Due to the complicated manufacturing process and high technical requirements of the glass ceramic panel, the high-quality glass ceramic production process and control technology are basically monopolized by foreign countries. Therefore, the domestic glass ceramic production process has problems of poor quality and low yield.
Machinable Glass Ceramic Plate,Machinable Ceramic Tube,Machinable Ceramic Bushing,Machinable Ceramic Sleeve
Dongguan Haikun New Material Co., Ltd. , https://www.nitrideceramic.com