MXene 表面终端：视角,The Journal of Physical Chemistry C

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MXene 表面终端：视角
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2023-10-06 , DOI: 10.1021/acs.jpcc.3c04324
Varun Natu _{1,

2} , Michel W. Barsoum

Affiliation

二维 (2D) 过渡金属碳化物和氮化物是已发现的最新且可能最大的 2D 材料家族之一。它们在许多应用中显示出前景，例如电磁屏蔽、电池和超级电容器等储能设备、透明导电电极、作为氢气生产的催化剂等等。它们的通式为 M _{n +1} X _n T _z ( n = 1–4) 或 M _1.33 XT _z，其中 M 是早期过渡金属，X 是碳和/或氮，T _z代表蚀刻时存在的各种终端铝层。第一个发现的 MXene Ti ₃ C ₂ T _z是通过使用氢氟酸 (HF) 从纳米层压 MAX 相 Ti ₃ AlC ₂蚀刻铝 (Al) 来合成的。自 2011 年发现 Ti ₃ C ₂ T _z以来，已有 30 多种其他具有不同 M 和 X 元素的 MXene 化学物质被报道。据观察，正如预期的那样，改变 MXene 化学性质也会影响上面列出的应用范围内的性能，使我们能够根据最适合感兴趣的应用来定制它们。与多年来在定制 M 和 X 元件方面取得的成功不同，直到最近，设计 T _{z的尝试仍然是一个挑战。}最近的一系列发现以及对 MXene 表面特性的深入了解使得 T _z的定制成为可能。这一进展增加了一个新的“旋钮”，可以转动它来进一步调整 MXene 属性。本视角的大部分内容集中在表面终止：它们的工程、表征以及对 MXene 性能的影响。

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MXene Surface Terminations: A Perspective

Two-dimensional (2D) transition metal carbides and nitrides are among the newest, and probably largest, families of 2D materials that have been discovered. They have shown promise in many applications, such as electromagnetic shielding, energy storage devices like batteries and supercapacitors, transparent conductive electrodes, as catalysts for hydrogen production, and several others. Their general formula is M_n+1X_nT_z (n = 1–4) or M_1.33XT_z, where M is an early transition metal, X is carbon and/or nitrogen, and T_z represents various terminations present upon etching the Al layer. The first MXene discovered, Ti₃C₂T_z, was synthesized by etching aluminum (Al) from the nanolaminated MAX phase Ti₃AlC₂ using hydrofluoric acid (HF). Since the discovery of Ti₃C₂T_z in 2011, more than 30 other MXene chemistries have been reported with different M and X elements. It has been observed that, as expected, changing the MXene chemistry also influences the properties in the range of applications listed above, allowing us to tailor them according to what suits the application of interest the best. Unlike the success in tailoring the M and X elements over the years, attempts to engineer T_z was, until recently, a challenge. A series of recent discoveries and an improved understanding of MXene surface properties has now rendered the customization of T_z possible. This progress added a new “knob” that can be turned to further tune MXene properties. The majority of this Perspective is focused on surface terminations: their engineering, characterization, and effect on MXene properties.

更新日期：2023-10-06

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