Synthesis of Two-Dimensional Nb1.33C (MXene) with Randomly Distributed Vacancies by Etching of the Quaternary Solid Solution (Nb2/3Sc1/3)2AlC MAX Phase

By J. Halim, J. Palisaitis, J. Lu, J. Thörnberg, E. Moon, M. Precner, P. Eklund, P. Persson, Michel W. Barsoum, J. Rosen. ACS Applied Nano Materials, 2018

190 citations recorded by the source corpus.

Introducing point defects in two-dimensional (2D) materials can alter or enhance their properties. Here, we demonstrate how etching a laminated (Nb2/3Sc1/3)2AlC MAX phase (solid solution) of both the Sc and Al atoms results in a 2D Nb1.33C material (MXene) with a large number of vacancies and vacancy clusters. This method is applicable to any quaternary, or higher, MAX phase, wherein one of the transition metals is more reactive than the other and could be of vital importance in applications such as catalysis and energy storage. We also report, for the first time, on the existence of solid solution (Nb2/3Sc1/3)3AlC2 and (Nb2/3Sc1/3)4AlC3 phases.

Subfields: Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/c1a4f07a7d6da851174b2fe248e80635c3cdfa17

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Citations in the corpus

• Recent advances in MXenes: From fundamentals to applications (2019, unknown): “33C MXene with randomly distributed vacancies [44].”
• MXenes: focus on optical and electronic properties and corresponding applications (2020, background): “Apart from the proportion of M and X elements, MXenes can also be sorted according to their crystal structure types, including mono M-element type, solid solution M-element type, ordered double M-element type, and vacancy ordering type (Table 1) [24, 34, 35].”