Architecting Layered CoFeOOH for the Oxygen Evolution Reaction: Engineering Structure for an Anion Exchange Membrane Water Electrolyzer
Source abstract
Abstract
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 (NO 3 – ) 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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Hybrid Renewable Energy Systems · Advancements in Solid Oxide Fuel Cells
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Energy& Environment Materials Research Division
Korea Institute of Materials Science (KIMS)
School of Chemical and Biological Engineering
Seoul National University (SNU)
Department of Chemical Engineering
Changwon National University
Department of Materials Science and Engineering
Ulsan National Institute of Science and Technology (UNIST)
Pusan National University (PNU)
Pohang University of Science and Technology (POSTECH)
Beamline Research Division, Pohang Accelerator Laboratory (PAL)
Department of Nanoenergy Engineering, Pusan National University, Busandaehak-ro 63 Beon-gil 2, Geumjeong-gu, Busan 46241, Republic of Korea
Department of Nano Fusion Technology, Pusan National University, Busandaehak-ro 63 Beon-gil 2, Geumjeong-gu, Busan 46241, Republic of Korea
Advanced Materials Engineering
University of Science and Technology (UST)
Funding
Korea Institute of Materials Science · Ministry of Science and ICT, South Korea · Changwon National University
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