AI Article Synopsis
- Seawater electrolysis is a promising method for generating green hydrogen, but challenges include high energy use and electrode breakdown.
- A novel 2D layered double hydroxide (LDH), specifically Vanadium Copper (VCu) LDH, demonstrates excellent stability, catalytic efficiency, and corrosion resistance, making it suitable for this process.
- VCu LDH shows impressive performance with low overpotentials for both hydrogen and oxygen evolution reactions in seawater conditions, indicating its potential as a highly efficient bifunctional electrocatalyst.
Article Abstract
Seawater electrolysis holds great promise for sustainable green hydrogen generation, but its implementation is hindered by high energy consumption and electrode degradation. Two dimensional (2D) layered double hydroxide (LDH) exhibits remarkable stability, high catalytic activity, and excellent corrosion resistance in the harsh electrolytic environment. The synergistic effect between LDH and seawater ions enhances the oxygen evolution reaction, enabling efficient and sustainable green hydrogen generation. Here, we report a synthesis of low cost, novel 2D Vanadium Copper (VCu) LDH first time in the series of LDH's as a highly efficient bifunctional electrocatalyst. The electrochemical (EC) and photoelectrochemical (PEC) study of VCu LDH and VCu LDH/Graphite Carbon Nitride (g-CN) nanohybrid was performed in 0.5 M HSO (acidic), 1 M KOH (basic), 0.5 M NaCl (artificial seawater), 0.5 M NaCl+1 M KOH (artificial alkaline seawater), real seawater and 1 M KOH+real seawater (alkaline real seawater) electrolyte medium. It was found that VCu LDH shows a remarkable lower overpotential of 72 mV hydrogen evolution reaction (HER) and 254 mV oxygen evolution reaction (OER) at current density of 10 mA/cm under alkaline real seawater electrolysis exhibiting bifunctional activity and also showing better stability.
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| http://dx.doi.org/10.1002/cssc.202400774 | DOI Listing |
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