By mimicking the energy conversion process of a tree, US scientists have recently developed an efficient solar hydrogen production technology. This technology hydrolyzes hydrogen gas more than twice as efficient as conventional technology, and can be easily installed on lakes, oceans, and land, providing a new choice for hydrogen fuel preparation.
Scientists all over the world have been exploring for hydrolytic hydrogen production technology for many years, but most of these technologies need to submerge photocatalysts in water. Since sunlight refracts and diffracts upon contact with the water surface, this greatly limits the efficiency of these techniques.
In the new study, Wang Xudong, an assistant professor at the Department of Materials Science and Engineering at the University of Wisconsin-Madison, and Dr. Cai Zhiyong from the US Forest Products Laboratory have made special innovations. They try to solve this problem by mimicking the tree's energy transformation process. The physicists' organization network recently reported that the top of this “tree†device is a panel made of cellulose and a catalyst coating made of titanium dioxide mesoporous materials, which can maximize sunlight and increase water and The area where the catalyst contacts, and at the bottom of this “tree†is a huge “root system†made up of nano-carbon fibers (CNFs). These nano-carbon fibers make root tissue capable of transporting water to the top catalyst “leafâ€. Where water will be broken down into hydrogen and oxygen. The whole process is very similar to the photosynthesis of trees.
Since the catalyst is not completely submerged in water while ensuring full contact with sunlight, this technology not only greatly accelerates the time for water decomposition, but also is much higher in hydrogen production efficiency than conventional technologies.
Wang Xudong said that, in general, the catalyst used for the hydrolysis of hydrogen is powdered. Not long ago, people began to use nanowires as catalysts. And they were the first to use catalyst coating technology based on nano-carbon fiber materials, which also has excellent hydrophilic properties compared to traditional technologies. “The placement of a container containing water on the ground can be used to obtain hydrogen fuel through this technology, and it would be more convenient if such a device could be set up on a lake or on the ocean. This technology is expected to minimize the limitations of the surface environment. In order to maximize the conversion efficiency of solar energy, the hydrogen production plant established by this technology can be built on land and can also be built on water bodies.Hydrogen is a green energy source with a wide range of applications. It is easily transported to many places, whether it is cars or buildings,†he said.
Next, Wang Xudong and his collaborators hope to create a larger prototype. The project is funded by the U.S. Department of Energy, and the U.S. Forest Products Laboratory is currently applying for a patent for this technology.
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