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Language: enSubject: Graphene nanoplatelet

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    Conference Object
    DEVELOPMENT OF BIMETALLIC ELECTROCATALYSTS FOR HIGH-TEMPERATURE ELECTROCHEMICAL HYDROGEN PURIFICATION
    (International Association for Hydrogen Energy, IAHE, 2022) Bal,İ.B.; Durmuş,G.N.B.; Devrim,Y.
    In this study, PtRu/GNP, PtIr/GNP, and RuIr/GNP bimetallic catalysts were synthesized by microwave-assisted synthesis method, and their performances on the high-temperature electrochemical hydrogen purification (HT-ECHP) were compared. The structural and electrochemical characteristics of the bimetallic catalysts were examined by the TGA, XRD, XPS, and CV techniques. ECHP Tests were performed with reformate gas mixtures containing hydrogen (H2), carbon monoxide (CO), and carbon dioxide (CO2) at temperatures between 140-180°C. The gas at the exit of the ECHP cell was analyzed with the gas chromatography device (GC), and high H2 purity was achieved. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.
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    Article
    Citation - WoS: 6
    Citation - Scopus: 7
    Fabrication and Performance Evaluation of Graphene-Supported Ptru Electrocatalyst for High-Temperature Electrochemical Hydrogen Purification
    (Pergamon-elsevier Science Ltd, 2023) Bal, Ilay Bilge; Durmus, Gizem Nur Bulanik; Devrim, Yilser
    The main aim of this study is to investigate the high-temperature electrochemical hydrogen purification (HT-ECHP) performances of graphene nanoplatelet (GNP) support material decorated with platinum (Pt) and platinum-ruthenium (PtRu) nanoparticles prepared by microwave irradiation technique. Prepared catalysts coupled to the phosphoric acid doped polybenzimidazole (PBI) membrane for HT-ECHP application. The structural and electrochemical properties of the catalysts were examined by thermogravimetric analysis (TGA), X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Transition electron microscopy (TEM) and cyclic voltammetry (CV) analyses. The characterization results indicate that the catalysts provided the necessary properties for HT-ECHP application. The HT-ECHP performances are investigated with reformate gas mixture containing hydrogen (H2), carbon dioxide (CO2) and carbon monoxide (CO) in the range of 140-180 & DEG;C. The results show that the electrochemical purification performances of the catalysts increase with increasing operating temperature. The highest H2 purification performance is obtained with PtRu/GNP catalyst. The high electrochemical H2 purification performance of the PtRu/GNP catalyst can be attributed to the strong synergistic interactions between Pt and Ru particles decorated on the GNP. These results advocate that the PtRu/GNP catalyst is a hopeful catalyst for HT-ECHP application. & COPY; 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.