Evolution of Surface Chemistry in Two‐Dimensional MXenes: From Mixed to Tunable Uniform Terminations

Jiang, Mengni; Wang, Di; Kim, Young‐Hwan; Duan, Chunying; Talapin, Dmitri V.; Zhou, Chenkun

doi:10.1002/anie.202409480

Title: Evolution of Surface Chemistry in Two‐Dimensional MXenes: From Mixed to Tunable Uniform Terminations

Journal Article · 07 August 2024 · Angewandte Chemie (International Edition)

DOI: https://doi.org/10.1002/anie.202409480 · OSTI ID:2427008

Jiang, Mengni ^[1]; Wang, Di ^[2]; Kim, Young‐Hwan ^[3]; Duan, Chunying ^[4]; Talapin, Dmitri V. ^[5];

^[6]

School of Chemistry and Material Science Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional Materials Nanjing Normal University 210023 Nanjing Jiangsu China
Department of Chemistry University of Chicago 60637 Chicago Illinois United States
Pritzker School of Molecular Engineering University of Chicago 60637 Chicago Illinois United States
State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University 210023 Nanjing Jiangsu China
Department of Chemistry University of Chicago 60637 Chicago Illinois United States, Pritzker School of Molecular Engineering University of Chicago 60637 Chicago Illinois United States, Center for Nanoscale Materials Argonne National Laboratory 60439 Argonne Illinois United States
School of Chemistry and Material Science Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional Materials Nanjing Normal University 210023 Nanjing Jiangsu China, Department of Chemistry University of Chicago 60637 Chicago Illinois United States, State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing University 210023 Nanjing Jiangsu China

Abstract Surface chemistry of MXenes is of great interest as the terminations can define the intrinsic properties of this family of materials. The diverse and tunable terminations also distinguish MXenes from many other 2D materials. Conventional fluoride‐containing reagents etching approaches resulted in MXenes with mixed fluoro‐, oxo‐, and hydroxyl surface groups. The relatively strong chemical bonding of MXenes’ surface metal atoms with oxygen and fluorine makes post‐synthetic covalent surface modifications of such MXenes unfavorable. In this minireview, we focus on the recent advances in MXenes with uniform surface terminations. Unconventional methods, including Lewis acidic molten salt etching (LAMS) and bottom‐up direct synthesis, have been proven successful in producing halide‐terminated MXenes. These synthetic strategies have opened new possibilities for MXenes because weaker surface chemical bonds in halide‐terminated MXenes facilitate post‐synthetic covalent surface modifications. Both computational and experimental results on surface termination‐dependent properties are summarized and discussed. Finally, we offer our perspective on the opportunities and challenges in this exciting research field.

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Sponsoring Organization:: USDOE

OSTI ID:: 2427008

Journal Information:: Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 37 Vol. 63; ISSN 1433-7851

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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