Optimization of N2O decomposition activity of CuO–CeO2 mixed oxides by means of synthesis procedure and alkali (Cs) promotion

The fine-tuning of CuO–CeO₂ mixed oxides by means of synthesis procedure (co-precipitation) and alkali promotion (1.0 at Cs per nm²) towards highly active deN₂O catalysts is demonstrated.

Preparation and characterization of mesostructured cellular foam silica supported Cu–Ce mixed oxide catalysts for CO oxidation

A series of mesostructured cellular foam (MCF) silica supported CuO–CeO₂ catalysts with various total metal loadings (10–40 wt%) and various Cu/Ce ratios (Cu/Ce = 1/9, 2/8, and 3/7 wt/wt) were prepared and tested for CO oxidation.

Construction of hybrid multi-shell hollow structured CeO2–MnOx materials for selective catalytic reduction of NO with NH3

Multi-shell CeO₂–MnO_x hollow spheres with superior catalytic performance were prepared via modification of the calcination rate.

Investigation of the interactions in CeO2–Fe2O3 binary metal oxides supported on ZSM-5 for NO removal by CO in the presence of O2, SO2 and steam

The 10Ce–10Fe/ZSM-5 catalyst exhibits superior resistance to O₂ and SO₂ due to the interaction between Fe₂O₃ and CeO₂.

High Efficiency CeCu Composite Oxide Catalysts Improved via Preparation Methods for Propyl Acetate Catalytic Combustion in Air

A famous hard-template method (HT), coprecipitation method (PC), and complex method (CA) were used to prepare CeCu composite oxide catalysts. The prepared catalysts were characterized via XRD, BET, Raman, XPS, FI–IR, and O2–TPD, and their catalytic activity and stability were evaluated for the propyl acetate catalytic combustion. The results showed that the CeCu oxide solid solution and oxygen vacancies were formed in the prepared CeCu oxide catalysts, even for CeCu–PC and CeCu–CA having a specific amount of isolated crystalline or amorphous CuO species. Comparing with the CeCu–PC and CeCu–CA of low porosity, CeCu–HT developed a mesoporous structure with a much larger specific surface area through a negative replica on the structure of KIT-6, and in it, CuO was completely dissolved in the CeO2 lattice to form more CeCu oxide solid solution and a large amount of oxygen vacancies. As a result, the CeCu–HT catalyst has more surface-adsorbed oxygen species, more –OH group which can also change into surface-adsorbed oxygen species at relatively high temperatures, higher oxygen desorption ability, and higher oxygen mobility than CeCu–PC and CeCu–CA. The CeCu–HT catalyst shows high and stable propyl acetate catalytic combustion performance at 190 °C. The propyl acetate catalytic combustion activity on the prepared CeCu oxide catalysts can be ranked as: CeCu–HT > CeCu–PC > CeCu–CA, which follows the orders of CeCu oxide solid solution content, surface-active oxygen content, and oxygen desorption and mobility of the CeCu composite oxide catalysts.

The enhanced performance of a CeSiOx support on a Mn/CeSiOx catalyst for selective catalytic reduction of NOx with NH3

A series of Mn/CeSiO_x catalysts were prepared by the wet impregnation method and used for selective catalytic reduction of NO with NH₃.

Fabrication and formation mechanism of Ce2O3–CeO2–CuO–MnO2/CNTs catalysts and application in low-temperature NO reduction with NH3

Ce₂O₃–CeO₂–CuO–MnO₂/CNTs catalysts were synthesized via a redox strategy, and presented 58–85% NO conversion at 80–180 °C.

Hollow CeO2dodecahedrons: one-step template synthesis and enhanced catalytic performance

Hollow CeO₂dodecahedrons are synthesized by a one-step template method and show enhanced catalytic performance for CO oxidation.

Preparation of hollow CuO@SiO2 spheres and its catalytic performances for the NO + CO and CO oxidation

The hollow CuO@SiO₂ spheres with a mean diameter of 240 nm and a thin shell layer of about 30 nm in thickness was synthesized using an inorganic SiO₂ shell coating on the surface of Cu@C composite that was prepared by a two-step hydrothermal method. The obtained hollow CuO@SiO₂ spheres were characterized by ICP-AES, nitrogen adsorption-desorption, SEM, TEM, XRD, H₂-TPR, CO-TPR, CO-TPD and NO-TPD. The results revealed that the hollow CuO@SiO₂ spheres consist of CuO uniformly inserted into SiO₂ layer. The CuO@SiO₂ sample exhibits particular catalytic activities for CO oxidation and NO + CO reactions compared with CuO supported on SiO₂ (CuO/SiO₂). The higher catalytic activity is attributed to the special hollow shell structure that possesses much more highly dispersed CuO nanocluster that can be easy toward the CO and NO adsorption and the oxidation of CO on its surface.

NO reduction by CO over CuO supported on CeO2-doped TiO2: the effect of the amount of a few CeO2

This work is mainly focused on the investigation of the influence of the amount of a few CeO₂ on the physicochemical and catalytic properties of CeO₂-doped TiO₂ catalysts for NO reduction by a CO model reaction.

Surface stabilities and NO oxidation kinetics on hexagonal-phase LaCoO3 facets: a first-principles study

The surface stability of hexagonal-phase LaCoO₃ has been studied and the LaO₃-terminated surface is catalytically most active towards NO oxidation.