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Manufacturing a multi-component electrocatalyst on an FTO substrate using step-by-step electrochemical synthesis routes for efficient water oxidation
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DOI：10.1016/j.rechem.2026.103285.png)
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Abstract
En 中文
Requiring higher overpotential for the oxygen evolution reaction (OER) compared to the hydrogen evolution reaction (HER) is considered a real obstacle for boosting the water splitting process, which results in obtaining the clean energy source hydrogen (H2). Hence, creating sufficient electrodes with low kinetic limitation for OER is announced as a promising solution for energy crises. The present work involved the fabrication of a multicomponent catalyst on a fluorine-doped tin oxide (FTO) substrate employing quick and efficient electrochemical techniques, including cyclic voltammetry (CV) and chronoamperometry (CA), for evaluating water oxidation in an alkaline electrolyte (0.1 M KOH, pH = 13). This study conducted numerous electroanalytical assessments to evaluate the electrocatalytic performance of the created electrodes in the OER. The created FeAlLDH/alpha-Fe2O3/BiVO4/FTO electrode exhibited the lowest overpotential of 290 mV to achieve a current density of 10 mA.cm- 2, along with the lowest Tafel slope of 36 mV.dec- 1, and higher Cdl amount of 31.85 mF.cm-2 when compared to the alpha-Fe2O3/BiVO4/FTO, BiVO4/FTO, alpha-Fe2O3/FTO, and bare FTO electrodes. The boosted ECSA and TOF calculations for FeAl-LDH/alpha-Fe2O3/BiVO4/FTO in contrast to other four electrodes are attributed to the improved intrinsic activity and the synergistic effects between FeAl-LDH, alpha-Fe2O3, and BiVO4 on the FTO surface.
Keywords:
Electrochemical synthesis
Layered double hydroxide
Electrocatalyst
Water oxidation
FTO