Ultrastable titania-supported Au nanoparticles covered by chromia via photo-induced strategy for low-temperature CO oxidation
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چکیده
منابع مشابه
CO oxidation mechanism on CeO(2)-supported Au nanoparticles.
Density functional theory was used to study the CO oxidation catalytic activity of CeO(2)-supported Au nanoparticles (NPs). Experimental observations on CeO(2) show that the surface of CeO(2) is enriched with oxygen vacancies. We compare CO oxidation by a Au(13) NP supported on stoichiometric CeO(2) (Au(13)@CeO(2)-STO) and partially reduced CeO(2) with three vacancies (Au(13)@CeO(2)-3VAC). The ...
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Water-oxygen interactions and CO oxidation by water on the oxygen-precovered Au(111) surface were studied by using molecular beam scattering techniques, temperature-programmed desorption (TPD), and density functional theory (DFT) calculations. Water thermally desorbs from the clean Au(111) surface with a peak temperature of approximately 155 K; however, on a surface with preadsorbed atomic oxyg...
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Infrared absorption spectroscopy is considered one of the most promising methods to study catalyst surfaces. A multitude of different applications and experimental techniques are available, such as transmission (TIR), attenuated total reflection (ATR), reflection–absorption (RAIRS) and diffuse reflectance (DRIFTS) modes. In this work, the latter technique was used, which allows us to analyze fr...
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Zirconia (ZrO2) nanoparticles co-doped with Cu and Pt were applied as catalysts for carbon monoxide (CO) oxidation. These materials were prepared through solution combustion in order to obtain highly active and stable catalytic nanomaterials. This method allows Pt2+ and Cu2+ ions to dissolve into the ZrO2 lattice and thus creates oxygen vacancies due to lattice distortion and charge imbalance. ...
متن کاملModifications induced by pretreatments on Au/SBA-15 and their influence on the catalytic activity for low temperature CO oxidation.
SBA-15 functionalization with mercaptopropyltrimethoxysilane has been used to prepare supported gold catalysts for the low temperature CO oxidation reaction. Supports and catalysts have been characterized by chemical analysis, CHS analysis, XRD, TGA, nitrogen adsorption-desorption at 77 K, TEM, CPMAS NMR, XPS and EPR. Catalytic runs have been carried out at atmospheric pressure and 313-623 K an...
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ژورنال
عنوان ژورنال: Catalysis Communications
سال: 2021
ISSN: 1566-7367
DOI: 10.1016/j.catcom.2020.106199