Nanjing University of Technology develops new catalysts to produce hydrogen at a cheap and sufficient amount
Hydrogen energy is increasingly favored as a class of high-energy-density renewable clean energy. When producing hydrogen using the electrolyzed water method, precious metal catalysts with high cost and scarce reserves (such as iridium oxide) were used in the past. The reporter learned from Nanjing University of Technology that the school has developed a new type of non-precious metal catalyst to replace the traditional iridium oxide catalyst at a price of only one-thousandth of iridium oxide. Publish.
According to Professor Zhou Wei, the research team, this new type of anti-perovskite-based non-precious metal catalyst not only has high catalytic activity, good stability, reduced energy consumption, but also is cheap and good in quality. Inverse perovskite combines the flexibility of perovskite structure with the advantages of high conductivity and excellent electrocatalytic properties of transition metal nitrogen (carbon) compounds. In theory, it is a kind of electrocatalyst for oxygen evolution reaction with great development potential. However, the bottleneck is similar to that of perovskite materials. The phase temperature is as high as hundreds or even thousands of degrees Celsius, which results in severe sintering of the material, low specific surface area, and minimal exposure of active sites. In view of this, the research team first designed the anti-perovskite catalyst, and then developed a porous composite catalyst with a core-shell structure. The catalyst only needs to be 0.23V higher than the thermodynamic theory to drive the oxygen evolution reaction.
According to Zhu Yanping, the first author of the paper, when hydrogen is produced by electrolyzed water, both the cathode and the anode will react. The cathode produces hydrogen and the anode produces oxygen. The reaction of the anode is very slow, which will limit the overall catalytic efficiency. "So the non-noble metal catalyst we developed for the anode makes the oxygen production rate faster, so that hydrogen production will not be delayed, and the overall production of hydrogen Efficiency is also greatly improved. "
The new non-precious metal catalyst developed by this research has extremely high catalytic activity and stability, and compared with the lack of reserves and high cost (600 yuan / gram) of iridium oxide, the price is only one thousandth of it. Practical application shows great prospects. (Reporter Zhang Ye correspondent Zhou Wei)
Motorcycle Bags,Motorbike Saddle Bag,Motorbike Back Seat Bag,Motorcycle Backpack Waterproof
Dongguan C.Y. RedApple Industrial Limited , https://www.redapplebags.com