High entropy NANoalloys as Solid-State HYdrogen stores:

The NANSSHY (High entropy NANoalloys as Solid-State HYdrogen stores) project proposes to develop high entropy multi-element alloys in the form of nanoparticles as novel solids for hydrogen storage. High entropy alloys in bulk state have recently shown very interesting performances in this field, while the advantages due to their nanosize have not yet been explored. The only area of research that currently gets large interest in high entropy alloys at the nanoscale is heterogeneous catalysis to take advantage of the synergy, the versatile properties, and the wide compositional space of these nanomaterials. In this context, the study of hydrogen sorption properties in nanoparticles of high entropy alloys is very original and may open new avenues for the design of multifunctional nanomaterials. Yet, the project poses real challenges at the experimental level: control of the chemical composition at nanoscale, in situ advanced microscopic characterization for in-depth comprehension of hydrogen reactivity and accurate acquisition of their storage properties. Therefore, we propose a partnership between three Ile de France laboratories, Institut de Chimie et des Matériaux Paris-Est (ICMPE), Laboratoire Matériaux et Phénomènes Quantiques (MPQ) and Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO). The success of the project relies on the well-established and complementary expertise of the teams (synthesis of nanomaterials, state-of-the-art microscopic characterization, evaluation of hydrogen storage performances).

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