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MXenes are a family of 2D transition metal carbides and nitrides with remarkable properties, bearing great potential for energy storage and catalysis applications. However, their oxidation behavior is not yet fully understood, and there are still open questions regarding the spatial distribution and precise quantification of surface terminations, intercalated ions, and possible uncontrolled impurities...
MXenes
In article number 2305183, Se‐Ho Kim, Baptiste Gault, and co‐workers report how impurities are detected on MXenes by careful nanoscale compositional mapping via atom probe tomography. The impurities remain attached upon oxidation of the MXene sheets that roll upon themselves. The presence of these impurities has often been overlooked, but is poised to play a role on the activity and stability...