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Layered Nano-Mosaic of Niobium Disulfide Heterostructures by Direct Sulfidation of Niobium Carbide MXenes for Hydrogen Evolution

  • Abstract MXene-transition metal dichalcogenide (TMD) heterostructures are synthesized through a one-step heat treatment of Nb2C and Nb4C3. These MXenes are used without delamination or any pre-treatment. Heat treatments accomplish the sacrificial transformation of these MXenes into TMD (NbS2) at 700 and 900 °C under H2S. This work investigates, for the first time, the role of starting MXene phase in the derivative morphology. It is shown that while treatment of Nb2C at 700 °C leads to the formation of pillar-like structures on the parent MXene, Nb4C3 produces nano-mosaic layered NbS2. At 900 °C, both MXene phases, of the same transition metal, fully convert into nano-mosaic layered NbS2 preserving the parent MXene's layered morphology. When tested as electrodes for hydrogen evolution reaction, Nb4C3-derived hybrids show better performance than Nb2C derivatives. The Nb4C3-derived heterostructure exhibits a low overpotential of 198 mV at 10 mA cm−2 and a Tafel slope of 122 mV dec−1, with good cycling stability in an acidic electrolyte.

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Document Type:Article
Author:Samantha HusmannORCiD, Mohammad TorkamanzadehORCiD, Kun LiangORCiD, Ahmad MajedORCiD, Chaochao DunORCiD, Jeffrey J. Urban, Michael NaguibORCiD, Volker PresserORCiD
Parent Title (English):Advanced materials interfaces
First Page:2102185
Year of first Publication:2022
Release Date:2022/05/16
Tag:MXenes; carbides; catalysis; hydrogen evolution reaction; metal sulfides
Impact:06.389 (2021)
Funding Information:German Research Foundation (DFG, Deutsche Forschungsgemeinschaft) of the electroMOXene project (PR-1173/9) and the MXene-CDI project (PR-1173/11) National Science Foundation under Grant No. DMR-2048164. Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Open Access:Open Access
Signature:INM 2022/045
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International