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Updated: May 2, 2026
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
Selenium-activated monolithic FeNi layered double hydroxide electrodes: binder-free, self-supported architectures for
Alaa Hassan1,2, Ghada E Khedr3, Aya K Gomaa1
1Energy Materials Laboratory (EML), Physics Department, School of Sciences and Engineering, The American University in Cairo New Cairo 11835 Egypt nageh.allam@aucegypt.edu.
None:
Developing earth-abundant, durable, and scalable oxygen evolution electrocatalysts is critical for alkaline water electrolysis. Herein, a monolithic, binder-free Se-activated FeNi layered double hydroxide (Se-FeNi-LDH) electrode grown directly on an ultrathin FeNi alloy substrate is introduced. This integrated architecture eliminates polymeric binders and interfacial resistance, enabling efficient electron/mass transport under industrial conditions. The optimized FeNi-LDH1-Se05 electrode delivers outstanding OER activity with overpotentials of only 240 and 290 mV at 10 and 100 mA cm-2, respectively, a low Tafel slope of 37 mV dec-1, and stable operation for 120 h at 100 mA cm-2. In a practical electrolyzer (Se-FeNi-LDH‖Pt), a cell voltage of 1.56 V at 10 mA cm-2 is achieved. Selenium incorporation modulates the electronic structure of Fe/Ni centers, enhances active surface area and charge-transfer kinetics, and maintains high faradaic efficiency (∼97.5%). This work establishes selenium activation in a binder-free monolithic LDH platform as a scalable, mechanically robust strategy for high-performance alkaline OER.
