Morphological Impact of Iron Tungstate on Electrochemical Properties in the Oxygen Evolution Reaction
Abstract
In this study, the influence of nanostructure and morphology was used as a comparative strategy to investigate the material’s performance. For this purpose, two distinct morphologies, one of which is novel for iron tungstate (nanoplatelets) and obtained by the hydrothermal method, were tested to verify their influence on the catalytic activity, reaction kinetics, and operational stability of the oxygen evolution reaction. Although the self-organized rosette and nanoplatelet morphologies maintain a monoclinic ferberite-type structure, the 2D nanoplatelet architecture shows an almost 30% reduction in catalytic activity and a 16% increase in reaction rate in basic medium (1 M KOH), in addition to four times higher turnover frequencies (TOF). Furthermore, the new morphology (nanoplatelets) provides higher charge density, lower charge transfer resistance, and favorable band edge positions, resulting in greater oxidation capacity (10 times more). Regarding the stability factor, both morphologies show a slight degradation over 1000 cycles, but the nanoplatelet morphology maintains almost constant activity, while the self-organized rosette morphology shows a performance drop of approximately 25%. These results demonstrate that morphological engineering is an effective means of improving electrocatalytic performance.
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BibTeX
@article{santos2026morphological,
title = {{Morphological Impact of Iron Tungstate on Electrochemical Properties in the Oxygen Evolution Reaction}},
author = {Andarair Gomes Dos Santos and Yassine Elaadssi and Virginie Chevallier and Christine Leroux and Madjid Arab},
journal = {Catalysts},
year = {2026},
month = jul,
doi = {10.3390/catal16070632},
url = {https://hal.science/hal-05753560v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Morphological Impact of Iron Tungstate on Electrochemical Properties in the Oxygen Evolution Reaction
AU - Andarair Gomes Dos Santos
AU - Yassine Elaadssi
AU - Virginie Chevallier
AU - Christine Leroux
AU - Madjid Arab
PY - 2026
DA - 2026/07/13
JO - Catalysts
DO - 10.3390/catal16070632
UR - https://hal.science/hal-05753560v1
AB - In this study, the influence of nanostructure and morphology was used as a comparative strategy to investigate the material’s performance. For this purpose, two distinct morphologies, one of which is novel for iron tungstate (nanoplatelets) and obtained by the hydrothermal method, were tested to verify their influence on the catalytic activity, reaction kinetics, and operational stability of the oxygen evolution reaction. Although the self-organized rosette and nanoplatelet morphologies maintain a monoclinic ferberite-type structure, the 2D nanoplatelet architecture shows an almost 30% reduction in catalytic activity and a 16% increase in reaction rate in basic medium (1 M KOH), in addition to four times higher turnover frequencies (TOF). Furthermore, the new morphology (nanoplatelets) provides higher charge density, lower charge transfer resistance, and favorable band edge positions, resulting in greater oxidation capacity (10 times more). Regarding the stability factor, both morphologies show a slight degradation over 1000 cycles, but the nanoplatelet morphology maintains almost constant activity, while the self-organized rosette morphology shows a performance drop of approximately 25%. These results demonstrate that morphological engineering is an effective means of improving electrocatalytic performance.
SN - 2073-4344
ER -