DiffuCarb™ E101 NiFeOx - Carbon Paper
Electrode for AEM Water Electrolysis

NiFeOx Catalyst — Function and Advantages

NiFeOx is a widely recognized low-cost, high-activity catalyst for oxygen evolution reaction (OER). In alkaline water electrolysis environments, it exhibits excellent electrochemical stability and catalytic activity, making it an effective catalyst for OER.

NiFeOx Catalyst — Catalytic Mechanism

The synergistic effect between Ni and Fe elements enhances the OER activity, making NiFeOx widely used in alkaline water electrolysis applications.

F200R Raw Carbon Paper

This carbon paper is untreated, maintaining its original conductivity and structural strength. It is typically used for low-cost, high-performance electrode designs, suitable for both laboratory research and industrial applications requiring large-area electrodes.

F200T Hydrophobic Carbon Paper

F200R raw carbon paper is treated with PTFE hydrophobic treatment.

F200P Platinum-Coated Carbon Paper

Platinum is coated onto F200R raw carbon paper, significantly improving conductivity and surface stability. The platinum coating enhances the electrode's overall performance, durability, and conductivity, making it suitable for high-performance water electrolysis applications.

PTFE Binder with F200T Hydrophobic Carbon Paper

PTFE (polytetrafluoroethylene) binder has excellent hydrophobicity and chemical stability, making it suitable for use in alkaline electrolytes. It enhances the electrode's mechanical strength and durability while providing some hydrophobic properties to prevent excessive water from entering the electrode pores, ensuring gas diffusion.

Nafion Binder with F200P Platinum-Coated Carbon Paper

Nafion is a proton-conducting polymer, traditionally used in acidic environments, but also performs well in alkaline conditions. Nafion binder firmly bonds the catalyst and provides ion conductivity, improving the electrode's overall electrochemical performance.

NiFeOx + F200R Raw Carbon Paper + PTFE Binder

Cost-Effective: Suitable for laboratory research and large-scale applications. It offers low cost while providing adequate conductivity and catalytic activity.

Hydrophobicity: PTFE binder's hydrophobicity helps with water management, preventing flooding of the electrode surface and ensuring efficient gas diffusion and removal of reaction products.

Applicability: Suitable for low-cost AEM water electrolysis systems with less stringent performance requirements.

NiFeOx + F200P Platinum-Coated Carbon Paper + Nafion Binder

High Performance: The platinum-coated carbon paper provides better conductivity and durability, while Nafion binder offers better adhesion and ion conductivity, making it suitable for applications requiring high current densities and efficient electrolysis reactions.

Applications: Ideal for high-performance water electrolysis systems, such as efficient hydrogen production devices or commercial electrolyzers.

High-Temperature Performance

PTFE has exceptional high-temperature resistance, with a melting point of around 327°C, much higher than many other binder materials. This allows PTFE to maintain its structural and chemical stability even at temperatures up to 150°C or higher, preventing decomposition or failure. Therefore, electrodes with PTFE can maintain long-term stability during high-temperature water electrolysis, avoiding material degradation and catalyst failure due to elevated temperatures.

Chemical Stability and Corrosion Resistance

PTFE's high chemical inertness makes it highly resistant to strong acids, bases, and oxidizing agents. This is especially important in the high pH environment of water electrolysis, where electrodes are exposed to strong alkaline and oxidative conditions. PTFE acts as an effective protective layer, preventing corrosion or oxidation of the electrode substrate and catalyst, thereby improving the electrode's durability and lifespan.

Hydrophobicity and Gas Management

The DiffuCarb™ E101T NiFeOx-carbon paper electrode (AEMWE) provides the right level of hydrophobicity. PTFE's hydrophobicity helps manage water and gas distribution during electrolysis. Its surface characteristics reduce water retention within the electrode, preventing clogging of the electrode pores. This ensures efficient release of oxygen and hydrogen gases during the reaction, preventing gas blockage and enhancing the OER efficiency and overall electrolysis performance.

Prevention of Over-Oxidation

At high operating potentials, electrodes face the risk of over-oxidation. PTFE's protective effect reduces direct contact between oxidants and the electrode material, preventing catalyst and carbon paper substrate oxidation. This protective mechanism extends the electrode's lifespan, maintaining high catalytic activity and electrochemical stability.

Enhanced Mechanical Strength and Wear Resistance

PTFE's high mechanical strength and wear resistance are crucial in high-temperature and high-current-density operations. The protective layer formed on the electrode surface effectively prevents catalyst particle detachment and mechanical damage to the substrate, ensuring the electrode's integrity and reliability in high-temperature and high-pressure environments.

Performance in High-Temperature Water Electrolysis Applications

In high-temperature water electrolysis systems (such as industrial hydrogen production and wastewater treatment), efficient operation and long-term stability are critical. Electrodes with PTFE binder can effectively meet these challenges. PTFE's high-temperature and corrosion resistance not only prolong the lifespan of the equipment and reduce maintenance needs, but also improve the system's overall economy and reliability.