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Density functional theory study of the interaction of Cu, Ag, and Au atoms with the regular CeO2 (111) surface
(American Chemical Society, 2010-02)
The interaction of Cu, Ag, and Au atoms with the regular terrace sites of the CeO2(111) surface has been investigated within the LDA+U and GGA+U density functional theory approaches using different U values and periodic ...
On the difficulties of present theoretical models to predict the oxidation state of atomic Au adsorbed on regular sites of CeO2 (111)
(American Institute of Physics, 2009-09-03)
The electronic structure and oxidation state of atomic Au adsorbed on a perfect CeO2 (111) surface have been investigated in detail by means of periodic density functional theory-based calculations, using the LDA+U and ...
Hydrogen purification of actual syngas streams for energy applications: Au-Cu supported over nano-shaped CeO2 as stable catalysts for the carbon monoxide removalPurificación de hidrógeno de flujos de gas de síntesis reales para aplicaciones energéticas: Au-Cu soportado sobre CeO2 nanoformado como catalizadores estables para la eliminación de monóxido de carbono
(Applied Catalysis A: General, 25/05/2020)
Nano-shaped CeO2 (i.e., polyhedra, rods and cubes) and CeO2 without defined morphology were compared as supports of AuCu/CeO2 catalysts in the CO removal of actual syngas streams. Catalyst characterization indicates that ...
Estudo do efeito da adição de Au, Pd e Pt em catalisadores Cu/CeO2 aplicados à reação de deslocamento gás-água a baixa temperatura
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Engenharia Química - PPGEQ, 2008-07-02)
Cu/CeO2 catalysts doped with Au, Pd or Pt (WGSR) were prepared and applied in water gas shift reaction. The CeO2 support was prepared by four different way: urea co-precipitation-gelation (CeO2-UGC), hydrothermal method ...
Density Functional Theory Study of the Adsorption of Au Atom on Cerium Oxide: Effect of Low-Coordinated Surface Sites
(American Chemical Society, 2009-03)
Periodic density functional calculations within the LDA+U and GGA+U formalisms have been carried for slabs representing the CeO2(111) surface and a stepped model surface. The surface active sites have been determined and ...
Monoliths washcoated with AuCu catalysts for CO removal in an ethanol fuel processor: Effect of CeO2–SiO2 dual support on the catalytic performance and reactor costMonolitos revestidos con catalizadores de AuCu para la eliminación de CO en un procesador de combustible de etanol: efecto del soporte dual CeO2-SiO2 en el rendimiento catalítico y el costo del reactor
(International Journal of Hydrogen Energy, 01/06/2020)
CO removal from a syngas was evaluated in a single catalytic unit using structured AuCu/CeO2–SiO2 catalysts. Initially, AuCu/CeO2–SiO2 powder catalysts with several SiO2 loadings (0–100 mol%) were assessed. SiO2 addition ...
Single and Dual Metal Oxides as Promising Supports for Carbon Monoxide Removal from an Actual Syngas: The Crucial Role of Support on the Selectivity of the Au–Cu SystemÓxidos metálicos simples y duales como soportes prometedores para la eliminación de monóxido de carbono de un gas de síntesis real: el papel crucial del soporte en la selectividad del sistema Au-Cu
(Catalysts, 2019)
A catalytic screening was performed to determine the effect of the support on the performance of an Au–Cu based system for the removal of CO from an actual syngas. First, a syngas was obtained from reforming of ethanol. ...
Metal enhanced luminescence of cerium oxide (IV) hollow sub-microspheres with au, aupd and pd nanoparticles
(2021-09)
This work reports an analysis of the luminescent properties of
Cerium oxide (IV) hollow sub-microspheres (CeO2-HS) as well as
the effect of the presence of Au, AuPd and Pd NPs over the
mentioned properties. CeO2-HS were ...
Single and Dual Metal Oxides as Promising Supports for Carbon Monoxide Removal from an Actual Syngas: The Crucial Role of Support on the Selectivity of the Au–Cu SystemÓxidos metálicos simples y duales como soportes prometedores para la eliminación de monóxido de carbono de un gas de síntesis real: el papel crucial del soporte en la selectividad del sistema Au-Cu
(Catalysts, 2019-10-13)
A catalytic screening was performed to determine the effect of the support on the performance of an Au–Cu based system for the removal of CO from an actual syngas. First, a syngas was obtained from reforming of ethanol. ...
Diffusion Barriers Block Defect Occupation on Reduced CeO2 (111)
(American Physical Society, 2016-06)
Surface defects are believed to govern the adsorption behavior of reducible oxides. We challenge this perception on the basis of a combined scanning-tunneling-microscopy and density-functional-theory study, addressing the ...