Methane conversion coupled with hydrogen production from water using Au/Ga2O3 photocatalysts prepared by different methods
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2023
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Sustainable Energy and Fuels
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Au/Ga2O3 photocatalysts were prepared by three different methods (pre-formed Au nanoparticles,
borohydride reduction, and impregnation-H2 reduction) and tested as photocatalysts for methane
conversion coupled with hydrogen production from water. The photocatalysts were characterized by Xray fluorescence, X-ray diffraction, UV-vis, scanning and transmission electron microscopy, X-ray
photoelectron spectroscopy, and PL spectroscopy. The reactions were performed with the
photocatalysts dispersed in water in a bubbling methane stream under UV-light illumination. The
products were identified and quantified by gas chromatography (GC-FID/TCD/MSD). The main products
formed were H2, C2H6, CO, and CO2 with minor quantities of C2H4, C3H8, and C4H10. The best
performances were observed for the photocatalysts prepared with the nominal Au content of 0.1 wt%
regardless of the method used. A production rate of about 100 mmol g−1 h−1 for C2H6 and 15 000 mmol
g−1 h−1 for H2 was obtained. The Au content, nanoparticle sizes and interactions with Ga2O3 strongly
influenced the photocatalytic activity.
Como referenciar
JANUARIO, ELAINE R.; CARMINATI, SAULO A.; TOFANELLO, ARYANE; SILVA, BRUNO L. da; SILVAINO, PATRICIA F.; MACHADO, ARTHUR P.; VAZ, JORGE M.; SPINACE, ESTEVAM V. Methane conversion coupled with hydrogen production from water using Au/Ga2O3 photocatalysts prepared by different methods. Sustainable Energy and Fuels, v. 7, n. 17, p. 4288–4296, 2023. DOI: 10.1039/d3se00629h. Disponível em: https://repositorio.ipen.br/handle/123456789/47866. Acesso em: 14 May 2024.
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