Russian scientists conducted a study on a new type of catalyst to produce hydrogen from water. This was reported by the press service of the RNF.
Hydrogen is a desirable fuel for green energy because when burned (or chemically converted to electricity) water is produced that does not pollute the atmosphere. In this regard, scientists are looking for suitable and environmentally friendly ways to produce this gas without using natural gas. This can be done by splitting the water using electricity or sunlight, which are more energy efficient. In the 20th century, scientists experimented with catalysts based on titanium dioxide and transition metal dialcogenides, but monolayers of Janus nanostructures were considered the most effective. They got their name because the lower and upper atomic rows are composed of different elements, similar to the two-faced Roman god Janus.
Experts from the NM Emanuel Institute of Biochemical Physics of the Russian Academy of Sciences conducted a study on a new catalyst that uses the properties of Janus structures to produce hydrogen from water. The scientists took sulfur, molybdenum, selenium, and tellurium-based compounds to run computer simulations of photocatalytic reactions in the presence of single-layer crystalline semiconductors with the Janus structure. It turned out that the most promising candidate for solar hydrogen production is a material based on the SMoTe compound (here S sulfur, Mo molybdenum and Te tellurium). The predicted solar to hydrogen conversion efficiency was 54% and 67.1% for neutral and acidic environments, respectively, well above the generally accepted commercialization limit of 18%.
The results of these theoretical studies can be used to create real material. The authors hope that such nanostructures will make it possible to create a sustainable hydrogen source for “green” energy.
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