Related Experiment Video
Updated: Jan 6, 2026

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
Architecting Layered CoFeOOH for the Oxygen Evolution Reaction: Engineering Structure for an Anion Exchange Membrane
Nam In Kim1,2, Youngji Kim3, Jaehun Lee1,4
1Energy& Environment Materials Research Division, Korea Institute of Materials Science (KIMS), Changwon 51508, Republic of Korea.
None:
Among the various metal oxide structures, the metal oxyhydroxide structure has garnered significant attention due to its superior electrochemical properties in the context of the oxygen evolution reaction. However, there are a limited number of studies focusing on the long-term performance analysis of this structure for adaptation in anion exchange membrane water electrolyzers (AEMWE). This study presents an approach to synthesizing a stable layered structure by reducing the d-spacing of the layers through ion exchange from nitrate (NO3-) to potassium (K+). A custom Fe precursor facilitated the exchange of Co with Fe, driven by a potential difference, while NaOCl enabled the oxidation of electrocatalyst hydroxides to oxyhydroxides. The chemical transformation was characterized using in situ Raman spectroscopy, demonstrating the role of Fe in enhancing the kinetics of CoFeOOH. The resulting CoFeOOH exhibited a performance of 2.0 A cm-2 at 1.8 V in the AEMWE system, with a long-term durability of 2100 h showing a degradation rate of only 49 mV kh-1. The postanalysis verified the preservation of morphology and the ratio of iron to cobalt concentration.
Related Concept Videos
Ion Exchange
Oxygenic Photosynthesis
Interfacial Electrochemical Methods: Overview
Thermal and Photochemical Electrocyclic Reactions: Overview
Electron Transport Chains
The ETC is comprised of...
Chemiosmosis
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...

