Journal
MATERIALS TODAY ENERGY
Volume 18, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2020.100513
Keywords
Edge-exposed nanoflakes; Hydrophilic/areophobic; Alkaline hydrogen production; Electrocatalysis
Funding
- Guangdong High-level Personnel of Special Support Program-Outstanding young scholar in science and technology innovation [2015TQ01C543]
- National Natural Science Foundation of China [51776094]
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306044]
- Foundation of Shenzhen Science and Technology Innovation Committee [JCYJ20180302174021198]
- Guangdong Provincial Key Laboratory of Energy Materials for Electric Power [2018B030322001]
- Basic Research Project of Science and Technology Plan of Shenzhen [JCYJ20180504165655180]
- Material Characterization and Preparation Center-Pico Center at SUSTech
- Development and Reform Commission of Shenzhen Municipality
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Transition metal chalcogenides with abundant active edge sites and suitable structures for large-scale water splitting in alkaline hydrogen evolution reaction (HER) are challenging but promising. Herein, hierarchical heterostructured nickel foam-supported Co3S4 nanorod arrays embellished with edge exposed MoS2 nanoflakes (Edge-MoS2/Co3S4@NFs) as an effective HER catalyst are designed. There into, porous nickel foam and moderately distributed nanorod arrays of Edge-MoS2/Co3S4@NFs provide multiscale pathways for efficient charge and mass transport and significantly enlarge the surfaces for the deposition of MoS2 flakes. The superhydrophilic/aerophobic surface improves the electrolyte transport and facilitates the detachment of hydrogen bubbles from the surface of the catalyst. The MoS2 flakes anchored on nanorods are well dispersed with plentiful active sites exposed which enhance the intrinsic activity of active sites owing to the adequate intersection of charge and mass. In addition, there is a synergetic effect of bimetal sulfides, evidenced by increasing the turnover frequency. Therefore, the Edge-MoS2/Co3S4@NF affords a low overpotential (eta(10) = 90.3 mV and eta(1000) = 502.0 mV) and small Tafel slope (61.69 mV dec(-1)). This study provides a facile strategy to develop electrocatalysts through the synergy of enhanced thermodynamic and kinetic processes, shedding lights on the advanced design of functional materials for energy chemistry. (C) 2020 Elsevier Ltd. All rights reserved.
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