(521au) Excellent Anion Exchange Membrane Electrolyser with Highly Active Oxygen Evolution Reaction Nife-LDH Self-Support Electrode

Anion exchange membrane water electrolyser (AEMWE) is attracting intensive attention for hydrogen generation due to the potential to employ non-precious metal catalysts. The design of high-performance and durable electrodes for the anodic oxygen evolution reaction (OER) of the AEMWE system is crucial for efficient hydrogen production. In this work, a highly effective NiFe-LDH self-supported OER electrode was prepared on nickel felt substrate through the hydrothermal method and then applied as the anode of the AEMWE. Benefit from in-situ growth on the nickel fibers and addition of conductive carbon black, the obtained NiFe-LDH self-supported electrode only required an overpotential of 275 mV to deliver 100 mA cm^-2 for OER. In the lab-scale AEMWE system, the NiFe-LDH self-supported electrode served as the anode exhibited enhanced performance (1.5A cm^-2@1.94 V) and superior durability with a low degradation rate at 500 mA cm^-2 for 100 h at 60 ℃. The enhanced electron and charge transfer process, high catalyst mass loading and low mass transfer resistance at high current density attributed to the promoted performance of NiFe-LDH electrode, demonstrating the feasibility of the application of the NiFe-LDH/NF in the commercial AEMWE system.