Molecular sieve catalysts containing transition metals have been attracting attention for their potential applications in various fields, including environmental and industrial catalysis. A Cu-Ce-Zr/SAPO-34 series of molecular were prepared by the impregnation method, effect Zr introduction on selective catalytic reduction NO Cu-Ce/SAPO-34 was explored. Through characterization methods, physica...

A low-cost and facile route to the synthesis of bimetallic glycolato zirconate (Na2Zr(C2H4O2)3) and homometallic glycolato cerate (Ce(C2H4O2)), which can be used as alkoxide precursors for sodium zirconium oxide (and/or zirconia by sol–gel process) and ceria materials, has been developed from the reaction of inexpensive starting materials via the oxide one-pot synthesis (OOPS) process. Both com...

Reported here are new data on the structural and catalytic properties of a series mono-component cobalt bi-component Co–Ce catalysts supported SBA-15 (Santa Barbara Amorphous-15)). The performance has been evaluated by tests combustion methane, propane, n-hexane. It was established that preparation ‘two-solvent’ technique does not significantly change mesoporous structure, however, its pores cl...

Nickel and ruthenium promoted by ceria were compared as catalyst active phase for the production of synthetic natural gas in a 1 kW fixed-bed reactor (49 cm length 3 diameter). Both catalysts tested broad range conditions: 250–450 °C, 8000–16000 h−1 GHSV, 3.5–5.5H2/CO2 ratio, atmospheric pressure. The Ni-based presented higher CO2 conversion lower reduction BET area metal dispersion after utili...

In this paper we report on the activity of Cuand Ni-containing cerium oxide catalysts for low-temperature water-gas shift (WGS). Bulk catalysts were prepared in nanocrystalline form by the urea co-precipitation–gelation method. Lanthanum dopant (10 at.%) was used as a structural stabilizer of ceria, while the content of Cu or Ni was in the range of 5–15 at.% (2–8 wt.%). At low metal loadings, C...

ZSM-11 zeolite was synthesized by hydrothermal treatment and cerium ion was incorporated by the ion exchange method.  The catalytic activity of cerium modified ZSM-11 zeolite was tested for the one-pot synthesis of 4H-pyran derivatives by cyclocondensation of aromatic aldehyde, malononitrile, and ethyl acetoacetate. The synthesized catalyst was characterized by Po...

Résumé. En Analyse Statistique Implicative, le logiciel CHIC offre des interfaces efficaces pour un usage accessible au non-spécialiste. Ce dernier est confronté à la lecture et l’interprétation des représentations graphiques produites par ce logiciel. Or contrairement à une idée répandue : « un dessin, un graphique parle de lui-même », l’interprétation des graphiques requiert des connaissances...

We explored the B-C-O system at pressures in the range 0-50 GPa by ab initio variable-composition evolutionary simulations in the hope of discovering new stable superhard materials. A new tetragonal thermodynamically stable phase B4CO4, space group I4[combining macron], and two low-enthalpy metastable compounds (B6C2O5, B2CO2) have been discovered. Computed phonons and elastic constants show th...

An efficient photoanode is a prerequisite for a viable solar fuels technology. The challenges to realizing an efficient photoanode include the integration of a semiconductor light absorber and a metal oxide electrocatalyst to optimize corrosion protection, light trapping, hole transport, and photocarrier recombination sites. To efficiently explore metal oxide coatings, we employ a high-throughp...

A set of ceria, ceria-zirconia (Ce 80 at.%, Zr 20 at.%), ceria-praseodymia (Ce 80 at.%, Pr 20 at.%) and ceria-zirconia-praseodymia (Ce 80 at.%, Zr 10 at.% and Pr 10 at.%) catalysts has been prepared by the solution combustion synthesis (SCS). The effects of Zr and Pr as dopants on ceria have been studied in CO and soot oxidation reactions. All the prepared catalysts have been characterized by c...