Au/TiO2 catalysts prepared by borohydride reduction for preferential CO oxidation at near-ambient temperature

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2019
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Catalysis for Sustainable Energy
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Au nanoparticles were prepared in solution using HAuCl4.3H2O as Au precursor, sodium citrate as stabilizing agent and sodium borohydride as reducing agent. The influence of synthesis parameters such as BH4:Au and Citrate:Au ratios were studied. In a further step, the stabilized Au nanoparticles were supported on TiO2 with different Au loadings (wt%). The resulting Au/ TiO2 catalysts were characterized by Energy-dispersive X-ray spectroscopy, X-ray diffraction and Transmission Electron Microscopy and tested for the preferential oxidation of carbon monoxide in hydrogen-rich stream. Au nanoparticles stabilized in solution were obtained with sizes in the range of 3-4 nm. After supported on TiO2, the Au nanoparticles size did not change and the Au/TiO2 catalysts exhibited excellent performance and stability in the temperature range of 20 - 50 °C.

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LEAL, GEORGIA B.; SILVA, DANIELA C.L. da; WATACABE, BEATRIZ N.; CIOTTI, LIGIA; ANTONIASSI, RODOLFO M.; GIUDICI, REINALDO; LINARDI, MARCELO; VAZ, JORGE M.; SPINACE, ESTEVAM V. Au/TiO2 catalysts prepared by borohydride reduction for preferential CO oxidation at near-ambient temperature. Catalysis for Sustainable Energy, v. 6, n. 1, p. 6-12, 2019. DOI: 10.1515/cse-2019-0002. Disponível em: http://repositorio.ipen.br/handle/123456789/30820. Acesso em: 29 Mar 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.

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