Reference : UPR8241-MYRKAH-005
Workplace : TOULOUSE
Date of publication : Thursday, June 23, 2022
Scientific Responsible name : KAHN
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 3 October 2022
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly
Description of the thesis topic
Hydrogen is one of the sustainable energy carriers envisaged for the future. Among the different types of hydrogen-forming compounds, Ti-based alloys are among the most promising materials. Titanium, in combination with a transition metal such as copper or iron, forms stable intermetallic compounds whose properties vary according to their composition. For example, TiFe2 does not adsorb hydrogen, whereas the TiFe alloy, which crystallises in the cubic CsCl structure, can adsorb up to 2 H/f.u. at room temperature. As for TiCu alloy, it is highly active in the generation of hydrogen from hydrogen storage materials needed for hydrogen fuel cell.
On the other hand, the evolution of the microstructure of titanium alloys can be significantly influenced by the non-uniformity of the alloy composition at the nanoscale which determines their performance. Therefore, the study of the relationship between the structural change of the alloy and the catalytic activity remains a topical issue in this context of major societal challenges.
In this thesis we will try to prepare bimetallic nanoparticles based on Ti associated with a transition metal such as Fe and Cu. The aim will be to establish the links between the nanometric structures obtained and the performance in the dehydrogenation reaction of borane amines. The (de)storage of H2 from amine-boranes presents several advantages: i) as stable solids, amine-boranes allow a secure storage of H2 compared to gaseous or pressurized liquid sources; ii) they also present a high storage capacity (20% by mass) which makes them excellent candidates for "mobile energy" applications and/or small single-use devices.
The Laboratoire de Chimie de Coordination (LCC) in Toulouse is a CNRS unit created in 1974 and operates as a real institute with 15 research teams and valuable administrative, scientific and technical services.
The work will take place in the "Nanochemistry, organisation and sensor" team under the responsibility of Myrtil Kahn.
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