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A chemist from RUDN University came up with a new catalyst for fuel synthesis

A chemist from RUDN University came up with a new catalyst for fuel synthesis

RUDN chemist synthesized a fundamentally new catalyst for formic acid photo‑oxidation, which is considered to be the most perspective source of hydrogen for fuel elements. A catalyst based on titanium amorphous oxide is a new instrument for formic acid conversion. In the future, it will allow to abandon traditional costly catalysts based on palladium, platinum, and ruthenium.

Hydrogen energetics development is not possible without methods of hydrogen secure storage and generation. Formic acid is a non-toxic and highly stable source of hydrogen. Н2 and СО2 are obtained by decomposition of acid under light irradiation on catalysts’NPs, the role of which is fulfilled by platinum, palladium, and other costly metals compounds. Chemists decided to test what the products of formic acid photo‑oxidation will be obtained if the cheaper layered amorphous oxide of titanium is used as a catalyst.

Professor Rafael Luque, United Institute of Chemical Research RUDN and his colleagues from Iran, Spain, China, and South Korea synthesized a catalyst — titanium amorphous oxide based on organic-silicate matrix. At the beginning the chemists obtained mesoporous (2-50 nm) matrix material, where bridging dimeric groups of organic viologen compound presented. Later the precursor — titanium butoxide was loaded, followed by matrix drying at 60 о С and its transformation into amorphous titanium oxide.

The chemists performed the reaction of formic acid oxidation in different conditions: different temperature regimes (from 25 to 60о С) and different quantity of catalyst from amorphous titanium oxide (from 5 to 20 mg), with different solvents (water, ethanol, methanol, and others). The results of experiments showed that the quickest reaction proceeds under UV radiation, in water and at room temperature, providing only CО2 and Н2О. Neither hydrogen, nor carbon monoxide, which poison any photo‑oxidation catalyst, were identified in products. Such products formation is due to the catalyst’s non-crystalline structure. In their work the authors came up with the photo-oxidation mechanism and specified basic stages.

The authors also found out that viologens improve the quality of catalyst, because it generates electron-proton vapors in photocatalysis, thus extending the lifetime of the catalyst. The catalyst can be easily reprocessed and reused at least in four cycles without noticeable ageing.

The scientists made an input in fundamental chemistry development, having investigated a new mechanism of formic acid formation. The results of the present research will allow to minimize risks and expenditures in common use of this type of catalyst in future development.

The article is published in the journal ChemCatChem.

International Projects View all
30 Jan 2018
The conference on international arbitration, where law students from European universities simulate court proceedings and alternately defend the interests of the respondent and the orator.
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30 Dec
Biologists from RUDN University discovered the secret of flaxseed oil with long shelf life

Biologists from RUDN University working together with their colleagues from the Institute of Molecular Biology of the Russian Academy of Sciences and the Institute of Flax studied the genes that determine the fatty acid composition in flaxseed oil and identified polymorphisms in six of them. The team also found out what gene variations could extend the shelf life of flaxseed oil. This data can be used to improve the genetic selection of new flax breeds. The results were published in the BMC Plant Biology journal.

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19 Apr
Dentists from RUDN University Presented a New Classification of Root Canal Shape Changes

Individual characteristics of the shape and cross-section of the root canal are one of the main issues for dentists. When treating a root canal, a doctor needs to properly clean it, fill it, and carry out a rebuilding procedure so that a canal is sealed. The first stage of endodontic treatment requires detailed knowledge of root canal anatomy. A team of dentists from RUDN University studied and classified various changes in root canal shapes. The new classification will help doctors avoid diagnostic errors, better select their tools, and treat patients more efficiently.

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19 Apr
A chemist from RUDN developed a green catalyst for pharmaceutical and industrial chemistr

Many production facilities (e.g. plastic manufacturers, pharma companies, and others) use nanocatalysts that contain palladium—an expensive component that is not sustainably produced. A chemist from RUDN University found a way to reduce palladium consumption and to make its manufacture more eco-friendly. He developed a catalyst based on a substance that comes from plant waste. Using his invention, manufacturers could cut palladium consumption in half. Moreover, new catalysts can be reused multiple times without any decrease in efficiency.

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