According to foreign media reports, Georgia Tech researchers have developed a multi-phase catalyst with their counterparts in China and Saudi Arabia. The product meets rationally designed requirements and can be updated to the latest. The kinetics of oxygen reduction of a solid oxide fuel cell cathode.
The catalyst is suitable for other energy storage and energy conversion systems, including: metal air batteries, supercapacitors, electrolyzers, dye-sensitized solar cells, and photocatalysis.
The catalyst can be used as a coating with a thickness of only 24 nanometers and contains two interconnected nanotechnology solutions.
First, the nanoparticles are highly attractive to attract oxygen atoms, thereby trapping oxygen molecules, allowing inflowing electrons to react quickly, thereby reducing the Yang molecules and splitting them into two separate oxygen ions (both For O2-). Then, so-called oxygen vacancies will form within the nanoparticle structure and adsorb the cations, allowing the latter to enter the second phase of the catalyst.
The second phase is a coating that is rich in oxygen vacancies that allows the cation to pass through the coating quickly and reach its final position.
After the oxygen ions can quickly pass through and enter the fuel cell, ionized hydrogen or another electron donor (such as methane or natural gas) will react with the cation, then generate water, and finally from the fuel cell. Flow out. If oxygen ions react with methane, pure carbon dioxide is emitted, which can be captured and recycled for reuse in the fuel cell.
In the first phase, there are two different types of nanoparticles at work. Both nanoparticles contain cobalt, and these two types of particulates also contain barium and praseodymium elements, respectively.
If the current fuel cell is to be used under high operating temperatures, the fuel cell needs to contain an expensive protective coating and cooling material. However, the researchers believe that the catalyst may help to lower the operating temperature of the battery, mainly because the catalyst can reduce the electrical resistance inherent of the current fuel cell chemistry, which may reduce its material. total cost.
The catalyst exhibits a lattice in the second stage containing lanthanum, cerium, calcium and cobalt (PBCC) elements. In addition to the catalytic function, the PBCC coating also prevents degradation of the cathode of the battery, thereby shortening the life of the battery or similar equipment.
The most critical cathode materials include metals such as lanthanum, strontium, cobalt, iron (strontium cobalt, LSCF), which have become standard materials in the industry.
LSCF's manufacturing system is quite complete, and if you add a new catalyst to this type of product, you may be able to achieve the above functions. The researchers are also considering the use of new catalyst materials and are currently working on another catalyst designed to drive the oxidation of fuel cell anodes.
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