Due to the over-exploitation and gradual depletion of fossil energy, the directed conversion of solar energy to chemical energy has increasingly attracted widespread attention in the industry. The traditional use of solar energy to drive the reaction path is based on semiconductor photocatalytic technology, but semiconductor materials do not have high catalytic activity and selectivity for many organic reactions. To solve this problem, Chinese scientists proposed to achieve organic catalytic reactions by combining the catalytic activity and optical properties of metals. This result was recently published in the internationally renowned chemical journal "German Applied Chemistry".
Palladium metal is a highly efficient catalyst for many organic reactions. However, compared with common gold and silver, conventional metal palladium nanomaterials have poor solar sunlight absorption capabilities, which poses great difficulties for solar energy capture and utilization.
Can you find a catalyst that has both high catalytic activity and solar energy utilization characteristics? To this end, Prof. Xiong Yujie’s group at the University of Science and Technology of China developed a class of metal palladium nanomaterials with a size of 50 nanometers and a concave structure, which can be broadly visible in the visible spectrum by reducing the structural symmetry and increasing the particle size. Absorbance, photothermal effect after light absorption is sufficient to provide heat source for organic hydrogenation reaction. The uniqueness of this design is that the nano-structures have superior light-gathering ability at the corners and corners to generate localized high temperatures, and the corners and corners are also high-reactivity sites for hydrogenation reactions, achieving a combination of solar energy utilization and catalytic activity. For one. Based on this design, they developed metal palladium nanomaterials that can effectively drive organic hydrogenation reactions at room temperature. Traditional thermal technology requires that the reaction be heated to temperatures above 70 degrees Celsius to achieve full chemical conversion.
Xiong Yujie said that, so far, the light-driven catalytic reaction based on metal materials is still a new research direction, and the role of metal materials in the process is still not clear to the industry. This progress not only provides the possibility of using solar energy as a substitute for heat source to drive the organic catalytic reaction, but also plays an important role in promoting the scientific design of related catalytic materials. It is expected to be applied to the photosynthesis of important chemicals in the future. (Man/Yan Huimin Yang Baoguo)
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