Researchers have developed a new two-dimensional material for hydrogen production, even from salt and dirty water under the action of sunlight.
Hydrogen is a perspective source of renewable energy, so scientists continue to look for more efficient and clean methods for obtaining it. One of the main methods is the decomposition of water under the action of sunlight. The problem is that, despite the huge stock on Earth, its large part is salted or contaminated. Today, only a few solutions are suitable for such water.
Now scientists from the Tomsk Polytechnic University together with colleagues from the Prague Higher School of Chemical Technology and University. Yana Evangelist Purkin in Usti-Nad-Labem created a three-layer material that uses infrared light to splitting water.
Its thickness is only 1 microme. The lower layer consists of a thin gold film, in the center there is a platinum layer with a thickness of 10 nm, and from above there is a metallological frame from a chromium combination with organic molecules, which also acts as a filter, which makes it possible to effectively use it in a polluted and salty medium.
When the material with water and under the action of infrared light on the gold sheet, electrons are formed, which move through the platinum layer to catalytic centers at the metallological frame boundary, initiate the restoration of protons and the release of hydrogen.
In the course of experiments, the square 10×10 cm from the new material per hour produced 0.5 liters H2, which is one of the best indicators today. In the future, the team plans to increase its efficiency due to the visible spectrum and ensure the use of 93% of the spectral volume of sunlight.
Recall that recently researchers have found storage
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