从MAB相Cr 2 AlB 2衍生的二维MBene CrB的首次演示,Journal of Materials Science & Technology

在这种交流中，首次展示了由MAB相Cr 2 AlB 2制备二维MBene CrB的可能性。这里M是过渡金属，A为基团III阿或IV甲元素，B是硼; MAB相是层状过渡金属三元硼化物，MBene用于强调从母体MAB相中损失A组元素并突出2D性质。可能的2D CrB纳米片是通过将Cr 2 AlB 2浸入而从Cr 2 AlB 2中选择性腐蚀掉Al层而制备的室温下在稀盐酸溶液中的粉末。使用X射线衍射和扫描电子显微镜以及能量色散X射线光谱仪（EDS）检查制备的2D CrB纳米片。另外，建立了不同的结构模型来解释观察到的现象。这项工作中的发现为从MAB阶段合成大量新的2D MBene打开了一扇门。

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In this communication, the possibility for the preparation of two-dimensional MBene CrB from MAB phase Cr2AlB2 is demonstrated for the first time. Herein M is a transition metal, A is a group IIIA or IVA element and B is boron; MAB phases are layered transition metal ternary borides, MBene is used to emphasize the loss of A group element from the parent MAB phases and to highlight the 2D nature. The possible 2D CrB nano sheets are prepared by selectively etching out Al layers from Cr2AlB2 by immersing the Cr2AlB2 powders in dilute HCl solution at room temperature. The as-prepared 2D CrB nano sheets are examined using X-ray diffraction and scanning electron microscopy and energy dispersive X-ray spectroscopy (EDS). In addition, different structure models are built to explain the observed phenomena. The discovery in this work opens a door to the synthesis of a large number of new 2D MBenes from MAB phases.