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

A chemist from RUDN 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.

All news
27 Apr
Vocabulary Size Affects One’s Ability to Differentiate Between Vowels in a Foreign Language, Say Linguists from RUDN University

A team of linguists from RUDN University established that a person’s ability to accurately differentiate between vowel sounds of a foreign language correlates with the size of their vocabulary in said language.

22 Apr
A Bifidobacterial Protein Capable of Reducing Inflammation in Patients with COVID-19 and Other Diseases Was Discovered by a RUDN University Geneticist

A geneticist from RUDN University studied the effect of Bifidobacterium (intestinal bacteria) on the inflammatory process and discovered that their surface protein is capable of stopping excessive or uncontrollable inflammation, like the one observed in COVID-19 patients. A fragment of this protein can be used as an anti-inflammatory medication when treating coronavirus and other diseases.

13 Apr
RUDN University mathematician suggested new approach to cooperative game

A mathematician from RUDN University developed a matrix representation of set functions. This approach is vivid and easy to check, and it makes the calculations easier. Among other things, the new development can be applied to cooperative game theory.