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DOI	10.1016/j.atmosenv.2020.117955
	Low-temperature oxidation of carbon monoxide over Bi-metallic nanoparticles incorporated three dimensional silica
	Hamdy M.S.; Al-Shehri B.M.; Eissa M.; Alharthi F.A.; Alghamdi A.A.; Al-Zaqri N.
发表日期	2021
ISSN	13522310
卷号	244
英文摘要	In the current study, four new catalysts were synthetized by using TUD-1 mesoporous material as a support for bi-metallic Noble metals nanoparticles. M-Au-TUD-1 (M = Rh, Pd, Pt, and Ag) were prepared with a total metals loading of 2 wt% by applying the ratio of 1Au:1M. Several physical and chemical characterizations were performed to understand the structure of the prepared catalysts. The characterization results showed the formation of bi-metallic alloys between Au and Pd, Rh or Ag, while the formation of alloy between Au and Pt was not confirmed under the applied synthesis conditions. The formed bi-metallic alloy nanoparticles were found to be highly distributed through the mesoporous silica and the average size of the formed nanoparticles was 15–30 nm. The prepared samples were investigated to catalyze the environmentally impacted reaction of carbon monooxide (CO) oxidation to carbon dioxide (CO2). The catalytic efficiency of Ag–Au catalyst was higher than the other investigated catalysts, 100% of CO gas was converted over Ag–Au catalyst at 25 °C. Moreover, Pt–Au and Pd–Au catalysts exhibited similar activity to bare Au nanoparticles. Moreover, the stability of the four investigated catalysts was investigated by using the same catalytic sample in ten consecutive reactions without treatment, Rh–Au-TUD-1 and Pt–Au-TUD-1 exhibited the highest stability, while, Ag–Au showed partial deactivation due to the oxidation of Ag to Ag2O. © 2020 Elsevier Ltd
英文关键词	Air purification; CO-Oxidation; Mesoporous silica; Noble metals; TUD-1
语种	英语
scopus关键词	Carbon dioxide; Carbon monoxide; Catalyst activity; Catalytic oxidation; Gold; Mesoporous materials; Metal nanoparticles; Oxidation; Silica; Silver oxides; Temperature; Bimetallic nanoparticles; Catalytic efficiencies; Chemical characterization; Consecutive reaction; Environmentally impacted; Low-temperature oxidation; Partial deactivation; Synthesis conditions; Gold nanoparticles; carbon dioxide; carbon monoxide; gold nanoparticle; metal nanoparticle; palladium; palladium nanoparticle; platinum; rhodium; silicon dioxide; silver; carbon monoxide; catalyst; low temperature; nanoparticle; oxidation; silica; adsorption; Article; catalysis; catalytic efficiency; chemical analysis; chemical composition; chemical structure; desorption; elemental analysis; low temperature; oxidation; particle size; pore size; priority journal; scanning electron microscopy; surface area; surface property; synthesis; ultraviolet visible spectroscopy; X ray diffraction; X ray photoemission spectroscopy
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144849
作者单位	Catalysis Research Group (CRG), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia; Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
推荐引用方式 GB/T 7714	Hamdy M.S.,Al-Shehri B.M.,Eissa M.,et al. Low-temperature oxidation of carbon monoxide over Bi-metallic nanoparticles incorporated three dimensional silica[J],2021,244.
APA	Hamdy M.S.,Al-Shehri B.M.,Eissa M.,Alharthi F.A.,Alghamdi A.A.,&Al-Zaqri N..(2021).Low-temperature oxidation of carbon monoxide over Bi-metallic nanoparticles incorporated three dimensional silica.Atmospheric Environment,244.
MLA	Hamdy M.S.,et al."Low-temperature oxidation of carbon monoxide over Bi-metallic nanoparticles incorporated three dimensional silica".Atmospheric Environment 244(2021).