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Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 61: Focus Session: 2D Transition Metal Carbides, Nitrides and Carbonitrides I (joint session DS/MM/O)

O 61.4: Vortrag

Mittwoch, 20. März 2024, 16:15–16:30, A 053

synthesis and characterization of 2D Mo/Ti solid solutions based MXene for hydrogen evolution reaction in alkaline media.Lola Loupias1, Claudia Morais1, Sophie Morisset1, Christine Canaff1, Zheming Li1, Patrick Chartier2, Vincent Mauchamp2, Thierry Cabioc'h2, Aurélien Habrioux1, and •Stéphane Célérier11Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers, CNRS, F-86073 Poitiers, France — 2Institut Pprime, UPR 3346 CNRS, Université de Poitiers, ISAE-ENSMA, BP 30179, 86962 Futuroscope-Chasseneuil Cedex, France

2D MXenes have gained an ever-increasing attention in various application fields. Their properties can be strongly tuned by modifying the M element in the Mn+1XnTx structure. Among them, Mo-based MXenes are beginning to be successfully explored in many areas. This work focuses on the synthesis and characterization of (Mo,Ti)n+1CnTx MXenes to understand their complex chemistry and to compare them with those of mono-metallic Mo2CTx and Ti3C2Tx. The potential of these materials as HER (hydrogen evolution reaction) catalysts is determined in alkaline medium. It is shown that Mo2Ti2C3Tx MXenes are a credible alternative to Mo2CTx MXenes since the surface properties of both MXenes are similar while their composition is quite different. Indeed, (Mo,Ti)n+1CnTx require lower temperatures and shorter time for the synthesis than for Mo2CTx, a great advantage from an industrial point of view. Finally, some avenues for improving the performance of MXenes for HER will also be described.

Keywords: MXene; (Mo,Ti)n+1CnTx; surface chemistry; surface properties; hydrogen evolution reaction

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