Amorphous Nickel-Iron Oxide (NiFeOx) Coated Electrode for Alkaline Electrolyzer, CAECEANiFeO
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Integrating NiFeOx (Nickel-Iron Oxide) onto Nickel felt creates a high-performance anode specifically engineered for the rigorous conditions of industrial alkaline electrolyzers. While Nickel foam is common in labs, Nickel felt is the preferred substrate for commercial-scale systems due to its superior fiber density and bubble management.
NiFeOx is an amorphous mixed-metal oxide that serves as the "pre-catalyst" for the Oxygen Evolution Reaction (OER). (1) Amorphous Advantage: Disordered NiFeOx typically outperforms crystalline versions because it possesses a higher density of coordinatively unsaturated sites (defects) that are more chemically active. (2) In-situ Reconstruction: Once voltage is applied in KOH, the surface of the NiFeOx naturally transforms into NiFeOOH (oxyhydroxide). This nanometer-thick layer contains the true active Fe^{4+} sites.
Metal felt (eg: Ti, Ni, SS) is a non-woven, sintered fiber network. Its physical structure provides distinct advantages over foam or mesh for high-current applications. (1) Micro-Fiber Connectivity: The felt consists of micro-scale fibers (typically 20–80 um in diameter) that are sintered together. This creates a much more robust electrical network compared to the thinner struts of metal foam. (2) Effective Surface Area: The dense, entangled fibers provide a massive surface area-to-volume ratio, allowing for high catalyst loading without clogging the 3D transport pathways. (3) Capillary Bubble Transport: The micro-pores in the felt act as capillary channels, pulling electrolyte in and pushing oxygen bubbles out more efficiently than larger-pore foams. This minimizes "gas shielding," which is the primary cause of efficiency loss at high current densities.
| Part Number |
CAECEANiFeO |
| Electrode Components |
Amorphous NiFeOx active material sprayed on the various conductive substrates |
| Binder Types |
Nafion ionomer was default selected, but PiperION is also available upon request. |
| Substrates |
(1) Nickel Felt (2) Titanium Felt (3) Stainless Steel Felt (4) Carbon Paper Special coating (eg: Pt) and hydrophobic surface treatment (eg: PTFE) on the substrate can be additionally supplied upon request. |
| Loading Amount |
2 mg/cm2 |
| Electrode Dimension |
L 50mm * W 50mm |
| Package Size | 1 pcs/pack |
Notes: Please try to store the NiFeOx electrodes in a dry place.
References:
- R. Suzuki, et al. Stability Investigation on NiFeOx Electrocatalysts for Oxygen Evolution During on and off Cycles in Harsh Alkaline Conditions, ChemElectroChem. 2025, 12, e202500081.
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H. Xu, et al. Strain Effects and Crystalline-Amorphous Interface of NiFe-LDH@S-NiFeOx/NF with Heterogeneous Structure for Enhancing Electrocatalytic Oxygen Evolution Reaction of Water-Electrolysis, Small, 2025, 21, 2406071.