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Home
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Electrodes

Iridium-Free NiFe Anode for AEM Water Electrolysis – HXP-an

HydroXpand Inc.
Iridium-Free NiFe Anode for AEM Water Electrolysis – HXP-an
Iridium-Free NiFe Anode for AEM Water Electrolysis – HXP-an
Iridium-Free NiFe Anode for AEM Water Electrolysis – HXP-an
Iridium-Free NiFe Anode for AEM Water Electrolysis – HXP-an

  • Iridium-free NiFe catalyst grown directly on nickel foam
    130 PPI substrate; 95–98% porosity
    Custom sizes up to 300 × 200 mm
    In-situ growth provides a binder-free catalyst layer with strong adhesion
    BET surface area approximately 25× that of untreated nickel foam
    Tafel slope: 131.6 mV/dec in three-electrode testing
    Accelerated stress test: 10,000 cycles

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Description Vendor

HXP-an | Iridium-Free NiFe Anode for AEM Water Electrolysis

An in-situ grown oxygen-evolution electrode designed to reduce reliance on iridium in AEMWE stacks.

HXP-an grows NiFe LDH directly on high-porosity nickel foam, combining catalyst and porous transport substrate in a customisable electrode format.

At a glance

CatalystNiFe LDH for OER
Substrate130 ppi nickel foam, 95–98% porosity
Maximum size300 × 200 mm
FabricationIn-situ growth
AST10,000 cycles completed

Why HXP-an

  • Iridium-free: NiFe chemistry supports lower critical-material exposure.
  • Directly grown catalyst: in-situ fabrication promotes strong contact with the nickel-foam substrate.
  • High surface area: approximately 25× untreated nickel foam by BET.
  • Custom format: dimensions can be adapted for research cells and reusable stacks.

Performance evidence

Tafel slope131.6 mV/dec, three-electrode
Reference operation0.3 M KOH at 60 °C
Accelerated stress test10,000 cycles, 1.0 ↔ 0.05 A/cm², 5 s

Electrode pairing guide

HXP-anNiFe LDH anodeIridium-free OER electrode
HXP-caPt/C or PtRu/C cathodeLow-PGM dry cathode
HXS-0Research hardwareScreen the complete electrode/MEA set

Typical project scenarios

  • Catalyst developer comparing iridium-free OER electrodes
  • MEA team sourcing custom-size anodes for AEMWE validation
  • Stack developer matching anode format to reusable hardware

Include in your RFQ

  • Required length, width and quantity
  • Cell active area and compression scheme
  • Operating and test conditions
  • Sampling, inspection and documentation requirements

Data note: the benchmark graphic is an example three-electrode dataset. Stack performance depends on the complete MEA and operating conditions.

HydroXpand Inc.

HydroXpand Inc. is a South Korean deep-tech company that develops and manufactures Anion Exchange Membrane Water Electrolysis (AEMWE) electrodes, cells, stacks, and integrated systems. Founded in 2023 by three KAIST PhDs, we work across catalysts, electrodes, stack architecture, balance-of-plant, and control software to reduce both upfront and lifecycle costs for clean hydrogen production.

Our current portfolio includes iridium-free anodes, low-PGM cathodes, single-cell and short-stack hardware, the HXS-2 2 kW stack, and the HXB-V1 2 kW integrated system. The HXS-30 30 kW pilot stack is under development and validation. HydroXpand products have been supplied to more than 50 customers across 10 countries, and our technology portfolio includes nine patents. The HXB-V1 is supported by a CE Declaration of Conformity.

Our stack architecture is designed so that the durable hardware can be reused while the MEA is replaced, reducing maintenance cost and material waste. Customers can start with laboratory or pilot-scale equipment today and expand through a modular development roadmap toward larger industrial systems.

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