TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Husmann, Samantha
A1  - Torkamanzadeh, Mohammad
A1  - Liang, Kun
A1  - Majed, Ahmad
A1  - Dun, Chaochao
A1  - Urban, Jeffrey J.
A1  - Naguib, Michael
A1  - Presser, Volker
T1  - Layered Nano-Mosaic of Niobium Disulfide Heterostructures by Direct Sulfidation of Niobium Carbide MXenes for Hydrogen Evolution
JF  - Advanced materials interfaces
N2  - 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.
KW  - carbides
KW  - catalysis
KW  - hydrogen evolution reaction
KW  - metal sulfides
KW  - MXenes
Y1  - 2022
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-218
SN  - 2196-7350
SS  - 2196-7350
U6  - https://doi.org/10.1002/admi.202102185
DO  - https://doi.org/10.1002/admi.202102185
VL  - 9
IS  - 14
SP  - 2102185
ER  -