Interlaced rosette-like MoS2/Ni3S2/NiFe-LDH grown on nickel foam: A bifunctional electrocatalyst for hydrogen production by urea-assisted electrolysis
| Autor: | Huimin Wu, Chuanqi Feng, He Mei, Maoxiao He, Shengnan Hu, Huakun Liu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Electrolysis
Hydrogen Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst 01 natural sciences 0104 chemical sciences law.invention Catalysis chemistry.chemical_compound Fuel Technology chemistry law Urea Water splitting 0210 nano-technology Bifunctional Nuclear chemistry Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 45:23-35 |
| ISSN: | 0360-3199 |
| Popis: | In targeting the most important energy and environmental issues in current society, the development of low-cost, bifunctional electrocatalysts for urea-assisted electrocatalytic hydrogen (H2) production is an urgent and challenging task. In this work, interlaced rosette-like MoS2/Ni3S2/NiFe-layered double hydroxide/nickel foam (LDH/NF) is successfully synthesized by a two-step hydrothermal reaction. Due to its unique interlaced heterostructure, MoS2/Ni3S2/NiFe-LDH/NF exhibits excellent bifunctional catalytic activity towards the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER) in 1.0 M KOH with 0.5 M urea. In a concurrent two-electrode electrolyser (MoS2/Ni3S2/NiFe-LDH/NF(+,-)), only voltage of 1.343 V is required to reach 50 mA cm−2, which is 216 mV lower than for pure water splitting. Furthermore, after 16 h of urea electrolysis in 1.0 M KOH with 0.5 M urea, the current density remains at 98% of the original value. Thus, the catalyst is not only favorable for H2 production, but also has great significance for the problem of urea-rich wastewater treatment. |
| Databáze: | OpenAIRE |
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