Article Dans Une Revue International Journal of Hydrogen Energy Année : 2025

In situ electrochemical synthesis of rhenium oxide-reduced graphene oxide hybrid electrodes for enhanced water splitting

J.-C. Bernede

Résumé

This study reports the in situ electrochemical synthesis of rhenium oxide nanoparticles on a glassy carbon (GC) electrode pre-modified with graphene oxide (GO), which is simultaneously reduced to reduced graphene oxide (rGO) during deposition. The resulting GC|rGO|ReOxNP electrodes were characterized by XPS, SEM, TEM, and EDS. Optimal HER performance was obtained with a 60 s deposition, achieving an overpotential of -0.160 V at 10 mA cm- 2 and a Tafel slope of 52 mV & sdot;dec- 1. The post-HER analysis showed that the optimum electrocatalytic properties were associated with the predominant rhenium oxidation states ReVI and ReVII. A key strength of this approach lies in its simplicity and sustainability: the electrochemical method provides a direct, single-step route for simultaneously depositing rhenium oxide nanoparticles and reducing GO to rGO under mild conditions. This eliminates the need for high-temperature treatments or multistep chemical procedures commonly reported in similar studies. These results highlight the potential of ReOxNP|rGO hybrid electrodes as efficient and scalable HER catalysts for green hydrogen production.

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Dates et versions

hal-05299956 , version 1 (06-10-2025)

Identifiants

Citer

A. Vergara-Pacheco, J.F. Adell, P. Preuss, N. Stephant, L. Cattin, et al.. In situ electrochemical synthesis of rhenium oxide-reduced graphene oxide hybrid electrodes for enhanced water splitting. International Journal of Hydrogen Energy, 2025, 172, pp.151374. ⟨10.1016/j.ijhydene.2025.151374⟩. ⟨hal-05299956⟩
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