How H2O may influence ambient CO oxidation over Au/BN

Tran-Thuy, Tuyet-Mai; Yu, Teng-Li; Lin, Shawn D.

doi:10.1016/j.apcatb.2022.121492

Cited by 3 publications

(2 citation statements)

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“…The peak at 2077 cm −1 corresponded to CO adsorption on Pd 0 [ 52 ]. The peak of adsorbed CO on the Pd-Au/FeO x /Al 2 O 3 catalyst (2183 cm −1 ) had a higher frequency than that of Au δ+ on the Au/FeO x /Al 2 O 3 catalyst (2190 cm −1 ), possibly because of overlapping peaks [ 51 , 52 , 54 , 55 , 56 ]. Bridge adsorption (CO B ) of CO occurs at 1957 cm −1 ; that is, CO is adsorbed on the metal centre of Au and Pd [ 53 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

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The Enhancement of CO Oxidation Performance and Stability in SO2 and H2S Environment on Pd-Au/FeOX/Al2O3 Catalysts

Wang²,

Liu

et al. 2023

Materials

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Carbon monoxide (CO) is a colourless, odourless, and toxic gas. Long-term exposure to high concentrations of CO causes poisoning and even death; therefore, CO removal is particularly important. Current research has focused on the efficient and rapid removal of CO via low-temperature (ambient) catalytic oxidation. Gold nanoparticles are widely used catalysts for the high-efficiency removal of high concentrations of CO at ambient temperature. However, easy poisoning and inactivation due to the presence of SO2 and H2S affect its activity and practical application. In this study, a bimetallic catalyst, Pd-Au/FeOx/Al2O3, with a Au:Pd ratio of 2:1 (wt%) was formed by adding Pd nanoparticles to a highly active Au/FeOx/Al2O3 catalyst. Its analysis and characterisation proved that it has improved catalytic activity for CO oxidation and excellent stability. A total conversion of 2500 ppm of CO at −30 °C was achieved. Furthermore, at ambient temperature and a volume space velocity of 13,000 h−1, 20,000 ppm CO was fully converted and maintained for 132 min. Density functional theory (DFT) calculations and in situ FTIR analysis revealed that Pd-Au/FeOx/Al2O3 exhibited stronger resistance to SO2 and H2S adsorption than the Au/FeOx/Al2O3 catalyst. This study provides a reference for the practical application of a CO catalyst with high performance and high environmental stability.

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