Three-dimensional ZnCo/MoS2–Co3S4/NF heterostructure supported on nickel foam as highly efficient catalyst for hydrogen evolution reaction.
- Resource Type
- Article
- Authors
- Jiang, Jibo; Cong, Haishan; Huang, Xing; Sun, Ran; Li, Yulu; Xu, Wenxiu; Wang, Heran; Han, Sheng
- Source
- International Journal of Hydrogen Energy. Jan2022, Vol. 47 Issue 5, p2947-2957. 11p.
- Subject
- *OXYGEN evolution reactions
*HYDROGEN evolution reactions
*FOAM
*NICKEL catalysts
*METAL catalysts
*ALKALINE solutions
*CATALYSTS
*LAYERED double hydroxides
*SUSTAINABLE chemistry
- Language
- ISSN
- 0360-3199
Exploring inexpensive and earth-abundant electrocatalysts for hydrogen evolution reactions is crucial in electrochemical sustainable chemistry field. In this work, a high-efficiency and inexpensive non-noble metal catalysts as alternatives to hydrogen evolution reaction (HER) was designed by one-step hydrothermal and two-step electrodeposition method. The as-prepared catalyst is composed of the synergistic MoS 2 –Co 3 S 4 layer decorated by ZnCo layered double hydroxides (ZnCo-LDH), which forms a multi-layer heterostructure (ZnCo/MoS 2 –Co 3 S 4 /NF). The synthesized ZnCo/MoS 2 –Co 3 S 4 /NF exhibits a small overpotential of 31 mV and a low Tafel plot of 53.13 mV dec−1 at a current density of 10 mA cm−2, which is close to the HER performance of the overpotential (26 mV) of Pt/C/NF. The synthesized ZnCo/MoS 2 –Co 3 S 4 /NF also has good stability in alkaline solution. The excellent electrochemical performance of ZnCo/MoS 2 –Co 3 S 4 /NF electrode originates from its abundant active sites and good electronic conductivity brought by the multilayer heterostructure. This work provides a simple and feasible way to design alkaline HER electrocatalysts by growing heterostructures on macroscopic substrates. [Display omitted] • An effective synthetic route for multi-layer heterostructures is proposed. • The multi-layer heterostructures improve electrochemical activity. • ZnCo/MoS 2 –Co 3 S 4 /NF has a good electrochemical performance in an alkaline solution. [ABSTRACT FROM AUTHOR]