Downes Marley, Shuck Christopher E, Wang Ruocun John, Michałowski Paweł Piotr, Shochat Jonathan, Zhang Danzhen, Shekhirev Mikhail, Yang Yizhou, Zaluzec Nestor J, Arenal Raul, May Steven J, Gogotsi Yury
A. J. Drexel Nanomaterials Institute, and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.
Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, United States.
J Am Chem Soc. 2024 Nov 13;146(45):31159-31168. doi: 10.1021/jacs.4c11111. Epub 2024 Oct 31.
The MXene family has rapidly expanded since its discovery in 2011 to include nearly 50 unique MXenes, not accounting for solid solutions and diverse surface terminations. However, a question raised since their discovery has been: What is the effect of ? In other words, how does the number of layers affect the MXene properties? To date, no direct study of the impact of has been conducted due to the lack of isoelemental MXene compositions spanning more than two values. Herein, we report on a system of three MXenes with identical M-site chemistries, (MoV)CT ( = 1, 2, and 3), allowing for the study of MXene structure-property relationships across , for the first time. Chemical analysis of the samples shows complete and partial ordering of the M-elements in the = 2 and 3 samples, respectively. We show that sample stability gradually evolves as is increased from 1 to 3, while electronic and electrochemical properties exhibit more significant changes in going from = 1 to 2 than from = 2 to 3.
自2011年发现以来，MXene家族迅速扩展，已包括近50种独特的MXene，这还不包括固溶体和多样的表面端基。然而，自其发现以来就一直存在一个问题：层数的影响是什么？换句话说，层数如何影响MXene的性质？迄今为止，由于缺乏跨越两个以上层数的同素异序MXene组成，尚未对层数的影响进行直接研究。在此，我们报道了一种由三种具有相同M位化学组成的MXene组成的体系，即(MoV)CT（层数分别为1、2和3），首次实现了对不同层数的MXene结构-性质关系的研究。对样品的化学分析表明，在层数为2和3的样品中，M元素分别呈现完全有序和部分有序。我们发现，随着层数从1增加到3，样品稳定性逐渐变化，而电子和电化学性质在从层数1到2的变化中比从层数2到3的变化表现出更显著的改变。
