Issue 9, 2019

Tin+1Cn MXenes with fully saturated and thermally stable Cl terminations

Abstract

MXenes are a rapidly growing family of 2D materials that exhibit a highly versatile structure and composition, allowing for significant tuning of the materials properties. These properties are, however, ultimately limited by the surface terminations, which are typically a mixture of species, including F and O that are inherent to the MXene processing. Other and robust terminations are lacking. Here, we apply high-resolution scanning transmission electron microscopy (STEM), corresponding image simulations and first-principles calculations to investigate the surface terminations on MXenes synthesized from MAX phases through Lewis acidic melts. The results show that atomic Cl terminates the synthesized MXenes, with mere residual presence of other termination species. Furthermore, in situ STEM-electron energy loss spectroscopy (EELS) heating experiments show that the Cl terminations are stable up to 750 °C. Thus, we present an attractive new termination that widely expands the MXenes' functionalization space and enables new applications.

Graphical abstract: Tin+1Cn MXenes with fully saturated and thermally stable Cl terminations

Supplementary files

Article information

Article type
Paper
Submitted
23 may 2019
Accepted
08 iyl 2019
First published
25 iyl 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2019,1, 3680-3685

Tin+1Cn MXenes with fully saturated and thermally stable Cl terminations

J. Lu, I. Persson, H. Lind, J. Palisaitis, M. Li, Y. Li, K. Chen, J. Zhou, S. Du, Z. Chai, Z. Huang, L. Hultman, P. Eklund, J. Rosen, Q. Huang and P. O. Å. Persson, Nanoscale Adv., 2019, 1, 3680 DOI: 10.1039/C9NA00324J

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