Ionomer-Free Nickel-Iron bimetallic electrodes for efficient anion exchange membrane water electrolysis

A bottleneck for the deployment of Anion Exchange Membrane Water Electrolysis (AEMWE) is manufacturing efficient and long lasting anodes cathodes cells. Highly performant bimetallic Ni/Fe catalyst films with various atomic ratios have been prepared by magnetron sputtering in an oblique angle configuration (MS-OAD) used as AEMWE. Electrocatalytic experiments a small three-electrode cell thorough analysis electrode properties physico-chemical characterization techniques to select nanostructured anode which, depicting optimized ratio, presents maximum activity oxygen evolution reaction. These layers are then scale-up their integration AEMWE where influence assembly conditions effect adding ionomer studied. The obtained results demonstrated outstanding fabricated terms activity, stability, operation under ionomer-free conditions. Current density values around 400 600 mA cm−2 at 40 °C 60 (2.0 V), respectively, much higher than those pure Ni, were membrane assembly. high yield these electrodes gains further relevance when considering that current per unit mass anodic active phase (i.e., 1086 mg−1 2.0 V °C) highest among equivalent reported literature. possibilities prospects use MS-OAD discussed.