Nickel-Iron Layered Double Hydroxide (NiFe-LDH) as Electrocatalysts for Electrolyzer and Metal-Air Battery, 1 g/bottle, CEMABENiFeLDH
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Nickel-Iron Layered Double Hydroxide (NiFe-LDH) is widely regarded as the most active non-precious metal electrocatalyst for alkaline energy applications. Its unique 2D "brucite-like" host layers provide a massive surface area and a tunable electronic environment that is perfectly optimized for oxygen and nitrogen-based chemistry.
In Anion Exchange Membrane (AEM) and Alkaline Water Electrolyzers (AWE), NiFe-LDH is the undisputed benchmark for the Oxygen Evolution Reaction (OER) at the anode. (1) Low Overpotential: Commercial-grade NiFe-LDH can drive significant current densities at remarkably low overpotentials, typically requiring only 230–260 mV to reach 10 mA/cm2 in 1.0 M KOH. (2) The Ni-Fe Synergy: The interaction between Ni and Fe centers optimizes the binding energy of O* and OH* intermediates. While Nickel provides the conductive framework, Iron is often cited as the true "active site" that triggers the 4-electron water-splitting process. (3) Seawater Electrolysis: NiFe-LDH is uniquely resistant to chloride corrosion. It is a top candidate for Direct Seawater Electrolysis, where it can split water into hydrogen and oxygen without generating toxic chlorine gas.
A growing application for NiFe-LDH is the Urea Oxidation Reaction (UOR), which is used for both wastewater treatment and "urea-assisted" hydrogen production. (1) Lower Voltage Requirements: Splitting water theoretically requires 1.23 V. However, oxidizing urea only requires 0.37 V. By replacing the water-splitting anode with a NiFe-LDH urea-oxidation anode, the total energy consumption of the electrolyzer can be reduced by over 15–20%. (2) Environmental Remediation: NiFe-LDH nanosheets are used to degrade urea in industrial and agricultural runoff, converting a pollutant into nitrogen gas and water while simultaneously generating clean hydrogen at the cathode.
| Part Number |
CEABNiFeLDH |
| Appearance |
Light Yellow to Brownish-Green |
| Specific Surface Area (BET): |
~120 m2/g |
| Testing Performance |
Overpotential for water oxidation: 230–280 mV at 10 mA/cm2 Tafel Slope: ~30–50 mV/dec |
| Electrolyte Stability |
Highly stable in alkaline conditions (pH > 13), but will dissolve in acidic environments (pH < 5) |
| Catalyst Ink Preparation |
10 mg NiFe-LDH + 50 um Nafion (5 wt%) + 4.95 mL DI H2O + 5 mL ethanol for 5 min ultrasonication to get well-dispersed ink |
| Catalyst Electrode Preparation |
(1) The substrate was ultrasonically cleaned with acetone, ethanol, and DI H2O for 10 min and dry it at 80°C. (2) Place the ink into the spray gun for uniform coating on the substrate. The classic loading is 1.0-4.0 mg/cm2. (3) The post-treatment on the coated substrate can be vacuum dried at 80°C for 2-4 h. |
| Package Size | 1.0 g/bottle |
Notes: Please try to store the NiFe-LDH powder in a dry place.
References:
- X. Li, et al. In-situ intercalation of NiFe LDH materials: An efficient approach to improve electrocatalytic activity and stability for water splitting, J. Power Sources, 2017, 347, 193-200.
- X. J. Zhai, et al. Advances in the design of highly stable NiFe-LDH electrocatalysts for oxygen evolution in seawater, Chem. Engineering J., 2024, 496, 1531874.