Back to Search
Start Over
Quasi zero-dimensional MoS2 quantum dots decorated 2D Ti3C2Tx MXene as advanced electrocatalysts for hydrogen evolution reaction.
- Source :
-
International Journal of Hydrogen Energy . Mar2022, Vol. 47 Issue 19, p10583-10593. 11p. - Publication Year :
- 2022
-
Abstract
- Developing advanced noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER) is still a great challenge. Herein, a novel HER catalyst with quasi zero-dimensional (0D) MoS 2 quantum dots (QDs) supported on two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets is facilely synthesized. The MoS 2 QDs/Ti 3 C 2 T x nanohybrid retains the unique layer structure, and the MoS 2 QDs are in situ formed and distributed uniformly. The obtained MoS 2 QDs/Ti 3 C 2 T x catalyst exhibits superior electrocatalytic activity due to its excellent conductivity, abundant of active sites exposed and a high percentage of 1T metallic phase (∼76%) of MoS 2 QDs. Remarkably, an early HER overpotential of 220 mV at 10 mA cm−2 and a small Tafel slope of 72 mV dec−1 of MoS 2 QDs/Ti 3 C 2 T x are achieved in 0.5 M H 2 SO 4 solution. In addition, the exchange current density of MoS 2 QDs/Ti 3 C 2 T x is ∼5 times larger compared with pure MoS 2 , thus demonstrating an accelerated charge transfer during the electrocatalytic process. [Display omitted] • A facile strategywas developed to synthesize MoS 2 QDs on Ti 3 C 2 T x MXene. • The catalyst contains highly conductive 1T phase MoS 2 and rich accessibleactive sites. • MoS 2 QDs/Ti 3 C 2 T x shows outstanding electrocatalytic performance towards HER. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROGEN evolution reactions
*QUANTUM dots
*ELECTROCATALYSTS
Subjects
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 47
- Issue :
- 19
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 155491151
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2021.12.185