MXene terminating groups=O,–F or–OH,–F or=O,–OH,–F,or=O,–OH,–Cl?

作     者：Tariq Bashir Sara Adeeba Ismail Jiaqi Wang Wenhao Zhu Jianqing Zhao Lijun Gao Tariq Bashir;Sara Adeeba Ismail;Jiaqi Wang;Wenhao Zhu;Jianqing Zhao;Lijun Gao

作者机构：College of EnergySoochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhou 215006JiangsuChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第76卷第1期

页      面：90-104,I0003页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(21703147 and U1401248) the support of China Scholarship Council(2018SLJ022487) 

主　　题：MXene surface terminating groups Characterization Conductivity Oxidation 

摘      要：MXenes are a novel family of two-dimensional(2D)materials that are fast gaining popularity due to their versatile *** surfaces of these materials are often functionalized by negatively charged terminal groups,such as=O,OH,and F during their synthesis,and it has been hypothesized that regulating the surface terminators enables to control the material ***,there is still a large gap between computational and experimental investigations regarding comprehending the surface functional *** with mixed terminations are consistently synthesized in experiments,although pure terminated surfaces are predicted by computational *** we summarized the nature of chemical bonding in transition metal carbide materials(MXenes)by1H and19F nuclear magnetic resonance(NMR),Raman,X-ray absorption near edge structure(XANES),extended X-ray absorption fine structure(EXAFS),ultraviolet photoelectron spectroscopy(UPS),X-ray photoelectron spectroscopy(XPS)/scanning transmission electron microscopy(STEM),and thermogravimetric analysis-mass spectrometry(TGA-MS)*** literature reveals that=O,–OH,–F,and–Cl are typical MXene surface ***,recent comparative investigations on the valence band intensity distribution in MXenes reveal that the–OH cannot be considered an intrinsic termination species in *** surface terminals(=O,–OH,–F,and–Cl)of several MXenes,particularly V2CTxand Ti3C2Tx,will be identified and quantified *** have also discussed different etching approaches for the synthesis of MXene,the dependence of MXene conductivity on MXene terminating groups,and the emission of various gaseous products that evolved during its chemical *** paper provides significance,especially in the field of energy conversion and storage materials,where the intercalation process is crucial.