Synthesis of iron and vanadium co‐doped mesoporous cobalt oxide: An efficient and robust catalysts for electrochemical water oxidation

• Published in: International journal of energy research Vol. 45; no. 6; pp. 9422 - 9437
• Main Authors: Amer, Mabrook S., Arunachalam, Prabhakarn, Ghanem, Mohamed A., Al‐Shalwi, Matar, Ahmad, Ashfaq, Alharthi, Abdulrahman I., Al‐Mayouf, Abdullah M.
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Inc 01.05.2021
• Subjects: bimetallic doping; Catalysts; Citric acid; Cobalt; Cobalt oxides; Doping; Electrocatalysts; Electrochemistry; Electrodes; Evaporation; evaporation induced self‐assembly; Evolution; Heavy metals; Iron; iron‐vanadium; mesoporous cobalt oxide; Metal concentrations; Optimization; Oxidation; Oxygen; oxygen evolution reaction; Oxygen evolution reactions; Vanadium
• ISSN: 0363-907X; 1099-114X
• DOI: 10.1002/er.6471

Summary Dual metal doping and optimization are considered as vital approaches for enhancing the electrocatalytic features toward oxygen evolution reaction. Herein, a sequence of Fe and V dual metal‐doped mesoporous cobalt oxide (FeV/meso‐Co) electrocatalysts was successfully synthesized through citric acid‐assisted evaporation‐induced self‐assembly (EISA) method. The textural, morphological, crystallinity, and electrochemical activities of Fe/V‐promoted meso‐Co (124 m2/g) are found strongly associated with dual (Fe and V) metal concentration. Benefiting from the combined effect of FeV‐doping, the FeV/meso‐Co exhibited an extremely lower overpotential of 280 mV to reach 10 mA/cm2 for oxygen evolution reaction (OER) in 1M KOH electrolyte, which was the considerably lowest value among the earlier catalysts, and the FeV/meso‐Co showed similar features as IrO2 electrodes. Furthermore, FeV/meso‐Co electrodes display highly durable (>30 hours) electrocatalytic performance for OER. This inexpensive approach of producing transition dual metal‐doped mesoporous materials offers excellent promise for fabricating efficient catalysts and other electrochemical energy‐conversion devices. In this paper, an Fe and V co‐doped mesoporous Fe and V co‐doped mesoporous cobalt (meso‐Co, 124 m2/g SA) electrocatalysts through citric acid‐assisted evaporation‐induced self‐assembly method and applied as a durable and efficient electrocatalysts for the electrochemical water reaction. These combined co‐doping strategies of ternary composite materials comprise only abundant elements creating them favourable materials for energy‐related applications.