AUTHOR=Camposeco R. , Sánchez-Flores N. A. , Zanella R. 

TITLE=Insights into CO oxidation on Au/TiO2-HMor zeolite catalysts at low temperature

JOURNAL=Frontiers in Nanotechnology

VOLUME=6

YEAR=2024

URL=https://www.frontiersin.org/journals/nanotechnology/articles/10.3389/fnano.2024.1359629

DOI=10.3389/fnano.2024.1359629

ISSN=2673-3013

ABSTRACT=<p>The effect of combining TiO<sub>2</sub> and mordenite zeolite (HMOR), employed as support of gold nanoparticles, on the CO oxidation reaction at low temperature is studied. The amount of TiO<sub>2</sub> encapsulated into HMOR was varied and the catalyst efficiency was investigated. The deposition-precipitation with urea (DPU) method was used to deposit gold nanoparticles; likewise, the synthesis of monometallic catalysts based on TiO<sub>2</sub> and HMOR is reported. The synthesized materials were characterized by X-ray diffraction (XRD), nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The addition of TiO<sub>2</sub> influenced the properties of the TiO<sub>2</sub>-HMOR composite, and its catalytic performance in the CO oxidation from 20°C. It was established that the 5Au/(28)TiO<sub>2</sub>-HMOR composite was the most active catalyst at lower temperatures, which was ascribed to the close contact among the components of the TiO<sub>2</sub>-HMOR composite, gold dispersion, gold and TiO<sub>2</sub> loadings, and Au and Ti species present in the catalysts.</p>