Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.116
Publication date: 16th December 2024
MXenes having Metal-surface functional groups as well as structural defects offer much potential as solid catalysts, similarly as it happens with other metal carbides/nitrides and metal oxides. In addition, MXenes are also suitable supports for single atom and small metal clusters. The presentation will show that NH3-thermoprogrammed desorption and pyridine adsorption/desorption monitored by IR spectroscopy are suitable techniques to measure the acidity of these materials. It has been found that the actual density of Brönsted and Lewis acid sites and their strength depends on the MXene type, preparation procedure and post-synthetic treatments. MXenes have been found to catalyze a series of organic reactions, including hydrocarbon oxidation, electrophilic additions to C-C triple and double bonds and guanylation reactions among other. In many of these cases, the turnover frequencies achieved by MXenes are among the highest reported for these reactions using solid catalysts. This is the case of 1-butanamine addition to 1-hexyne for which turnover frequencies over 104 h-1 have been measured. This illustrates the potential that MXenes can offer in the field.
Financial support by the Spanish Ministry of Science and Innovation (CEX-2021-001230-S and PDI2021-0126071-OB-CO21 funded by MCIN/AEI/ 10.13039/501100011033), Generalitat Valenciana (Prometeo 2021/038 and Advanced Materials programme Graphica MFA/2022/023 with funding from European Union NextGenerationEU PRTR-C17.I1) and European Commission through the ERC Adv. Grant DISCOVERY is gratefully acknowleged.
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