The catalytic selective oxidation of isobutane to methacrolein (MAC) and methacrylic acid (MAA) is known proceed via a Mars-Van Krevelen mechanism. When the reaction performed in common reactor with co-feeding reactant oxygen, reactive oxygen species are present on catalyst surface whereby non-selective reactions occur. In this work, we studied possibility decouple redox mechanism meaning separ...

A propane combustion catalyst based on Mn and Ce supported by SBA-15 was prepared the “two-solvents” method aiming at possible application in catalytic converters for abatement of alkanes waste (exhaust) gases. The characterization carried out SAXS, N2-physisorption, XRD, TEM, XPS, EPR H2-TPR methods. catalysts’ performance evaluated tests methane, butane. reaction kinetics investigation showed...

Volatile organic compound (VOC) abatement has become imperative nowadays due to their harmful effect on human health and the environment. Catalytic oxidation appeared as an innovative promising approach, pollutants can be totally oxidized at moderate operating temperatures under 500 °C. The most active single oxides in total of hydrocarbons have been shown manganese cobalt oxides. main factors ...

Engineering a bimetallic system with complementary chemical properties can be an effective way of tuning catalytic activity. In this work, CO oxidation on CeO2(111)supported Pd-based bimetallic nanorods was investigated using density functional theory calculations corrected by on-site Coulomb interactions. We studied a series of CeO2(111)supported Pd-based bimetallic nanorods (Pd−X, where X = A...

DFT+U calculations of CO oxidation by Au13 nanoclusters (NCs) supported on either CeO2 or doped (X-Ce)O2 (X = Au, Pt, Pd, Ti, Ru, Zr) show that doping the CeO2 support accelerates CO oxidation by the Mars-van Krevelen mechanism at the Au-(X-Ce)O2 interface. We find that Au, Pd, Pt, and Ti dopants significantly lower the vacancy formation energy of the CeO2 support and that electron donation fro...

Co3O4, MgCo2O4 and MgO materials have been synthesized using a simple co-precipitation approach systematically characterized. The total conversion of toluene to CO2 H2O over spinel with wormlike morphology has investigated. Compared single metal oxides (Co3O4 MgO), the highest activity exhibited almost 100% oxidation at 255 °C. obtained results are analogous typical precious supported catalysts...

The chemical looping reforming (CLR) process, which utilizes a transition metal oxide based redox catalyst to partially oxidize methane to syngas, represents a potentially efficient approach for methane valorization. The CLR process inherently avoids costly cryogenic air separation by replacing gaseous oxygen with regenerable ionic oxygen (O(2-)) from the catalyst lattice. Our recent studies sh...

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...