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Turkish Journal of Chemistry

Abstract

In this study, Pt/WO3 nanoparticles were synthesized using a simple room-temperature impregnation-reduction method and characterized by advanced techniques including ICP, TEM-EDX, FE-SEM-EDX, and XRD. The ICP-OES analysis confirmed a 1.0 wt. %Pt loading on the WO3 support. TEM and FE-SEM analyses revealed that the Pt nanoparticles were well dispersed with an average size of approximately 3.7 nm. The XRD patterns showed characteristic WO3 peaks without any detectable Pt diffraction peaks, indicating the high dispersion of Pt. Electrochemical evaluations demonstrated that the Pt/WO3 catalyst exhibited outstanding hydrogen evolution reaction (HER) performance, with –27.8 mV vs. RHE onset potential and –37.4 mV overpotential at 10 mA.cm–2, outperforming bare WO3. The Tafel slope (b) of 68.6 mV·dec–1 indicates efficient reaction kinetics following the Volmer-Heyrovsky pathway. The impedance analysis confirmed efficient charge transfer, with a b value of 69.7 mV.dec–1. The ECSA was calculated as 8.575 cm2, highlighting the high surface activity of the catalyst. Stability tests showed minor degradation but retained significant catalytic activity. This work emphasizes the potential of Pt/WO3 as an environmentally friendly, cost-efficient catalyst with promising applications in HER, providing a scalable and effective approach to hydrogen production.

Author ORCID Identifier

MERVE AKBAYRAK: 0000-0003-3283-2146

DOI

10.55730/1300-0527.3734

Keywords

Hydrogen evolution reaction, electrocatalyst, platinum, tungsten oxide, electrochemical water splitting, metal oxides

First Page

346

Last Page

359

Publisher

The Scientific and Technological Research Council of Türkiye (TÜBİTAK)

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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