Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.374
Publication date: 16th December 2024
The characterization of the electronic structure of nanomaterials, ideally in operando in an electrolyte, is essential for electrochemical applications such as in energy storage and conversion. To this aim, soft X-ray spectroscopies are particularly relevant as they enable the selective characterization of either the electrolyte or the material of interest thanks to their element specificity.1 Furthermore, the high chemical sensitivity of X-ray absorption spectroscopy coupled to the high spatial resolution (<30 nm) offered by soft X-ray spectromicroscopy enables the chemical imaging of nanomaterials, which can provide precious information about local inhomogeneities at the nanoscale.2 In this talk, I will introduce synchrotron-based in situ soft X-ray spectromicroscopy techniques and explain how they can be applied to investigate carbon nanomaterials. A special emphasis will be provided on in situ cells allowing characterization under controlled atmosphere or in liquid in the soft X-ray range. These techniques will be illustrated by our recent work on the characterization of two class of nanomaterials: (i) nanoporous carbon materials in which the addition of nitrogen can modify the interaction with water molecules,3 and (ii) 2D titanium carbides MXenes, for which the chemical bonding between the Ti and C atoms remains poorly investigated. The role of hydration will be particularly discussed along future perspectives of X-ray spectromicroscopy.
This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 947852).
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