Fe-Incorporated Metal-Organic Cobalt Hydroxide Toward Efficient Oxygen Evolution Reaction

Metal-organic cobalt hydroxide emerges as a cost-effective electrocatalyst for the oxygen evolution reaction (OER) in energy conversion. However, the limited active sites and poor conductivity hinder their large-scale application. This study employed salicylate as a bridging ligand to synthesize iro...

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Bibliographic Details
Published in:Electrocatalysis 2024, Vol.15 (4), p.273-280
Main Authors: Jiang, Tao, Yao, Yuechao, Wu, Feiyan, Aziz, Iram, Zhang, Wenjing
Format: Article
Language:English
Subjects:
Catalysis
Charge transfer
Chemistry
Chemistry and Materials Science
Cobalt
Electrocatalysts
Electrochemistry
Energy conversion
Energy Systems
Hydrogen production
Iron
Oxygen evolution reactions
Photoelectrons
Physical Chemistry
X ray photoelectron spectroscopy
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Summary:Metal-organic cobalt hydroxide emerges as a cost-effective electrocatalyst for the oxygen evolution reaction (OER) in energy conversion. However, the limited active sites and poor conductivity hinder their large-scale application. This study employed salicylate as a bridging ligand to synthesize iron-incorporated metal-organic cobalt hydroxide. The influence of Fe intercalation on Co(OH)(Hsal) (where Hsal denotes o -HOC 6 H 4 COO − ) was investigated using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Fe 0.2 Co 0.8 (OH)(Hsal) demonstrates remarkable electrocatalytic activity, displaying an OER overpotential of 298 mV at 10 mA cm −2 and a Tafel slope of 57.46 mV dec −1 . This enhancement can be attributed to improved charge transfer kinetics and increased active sites. This work highlights the crucial role of Fe in improving the efficiency of Co-based oxygen-evolving catalysts (OECs) and its potential for boosting efficient hydrogen generation in alkaline environments. Graphical Abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-024-00871-0