Introduction to Composite Oxides

The surface oxygen vacancy concentration on ZnCeZrO composite oxides was finely tuned through modulating the preparation method and altering the precursor calcination temperature; the effect of the surface oxygen vacancy concentration on the performance of bifunctional ZnCeZrO/SAPO-34 catalysts in the direct conversion of syngas into light olefins (STO) was then investigated.

Manganese-cerium composite oxides supported on titanium dioxide (MnO x -CeO 2 /TiO 2 ) or TiO 2 and carbon nanotubes (CNTs) composite carrier (MnO x -CeO 2 /TiO 2 -CNTs) were prepared using sol–gel method, and their catalytic activity towards simultaneous abatement of ortho-dichlorobenzene (o-DCBz, model molecular to simulate PCDD/Fs) and NO was investigated.

In this work, iron–niobium, iron–titanate and iron–molybdenum composite oxides were synthesized by a co-precipitation method with or without the assistance of hexadecyl trimethyl ammonium bromide (CTAB).

A series of Mn-Ti composite oxides (MnyTi1−yOx) were prepared via the sol-gel method, and their reducibility and surface acidity were controlled by adjusting the Mn/Ti molar ratio.

The design of active sites with composite oxides provides a new approach for developing high-performance catalysts.

Cobalt-manganese composite oxides have high-activity potential for catalytic oxidation of volatile organic compounds (VOCs).

The multi-metal compounds involve not only transition metal composite oxides with specific crystalline structures, binary metal chalcogenides, double or complex salts, but also the metal compounds doped or partially substituted by other metal ions.

5CoxMn1−xO3−δ (LSCM) perovskite composite oxides prepared by co-doping of Co and Mn in B site-activated peroxymonosulfate (PMS) to degrade tetrabromobisphenol A.

The implementation of nano-engineered composite oxides opens up the way towards the development of a novel class of functional materials with enhanced electrochemical properties.

The AF laths were induced by fine Al–Si–Ti–Mn composite oxides (0.

The implementation of nano-engineered composite oxides opens up the way towards the development of a novel class of superior energy materials.

Molten-solid composite oxides are candidates as oxygen transport membranes (OTMs) at intermediate temperatures.

The formation of ternary composite oxides in a high-temperature environment has laid the foundation for the design of high-temperature wear-resistant self-lubricating film.

After the flame tests at 1350 °C for 20 min, the uncoated specimens formed composite oxides of Nb2O5 (s), Ta2O5 (s), and V2O5 (s) with porosity of MoO3 (g) and WO3 (g) with a weight gain.

Cycloadditions of epoxides and carbon dioxide into corresponding cyclic carbonates were performed over mesoporous Ta–W composite oxides prepared by a modified hydrolytic method.

The results showed that the different Fe/Mn molar ratios and calcination temperatures have important effect on FeMn composite oxides performance.

The results showed that multilayer oxide films formed in the air at 800 °C, 900 °C and 1000 °C, the outer layer was mainly Cr2O3 with a small amount of Al2O3, TiO2 and composite oxides such as CrTi spinel.

The various metals doped in NiO and their composite oxides have shown good structural stability, reversible capacity, long cycling stability and have been also studied nano structured electrode materials for electrochemical supercapacitor applications.

As expected, the weight contents of CuO within dual CuO/ZnO oxides can be determined to be 20 wt% and 80 wt%, and the resultant composite oxides were marked as 1-CuO/ZnO and 2-CuO/ZnO, respectively.

The successful application of this catalyst in LOBs offers a novel route in the aspect of the synthesis of other hollow porous composite oxides as catalysts for cathodes in LOBs systems by the MOF template method.

When the Ce3+ was added with Cu2+ simultaneously at the mixing stage, it was favor to form robust Cu-Ce composite oxides.

Highly active Zn–Al composite oxides were synthesized via a hydrothermal process followed by thermal treatment and were used as supports to prepare Ni-based hydrogenation catalysts for catalytic deoxygenation of oleic acid, stearic acid, and 1-octadecanol.

Phase study showed that a series of Mn-Fe composite oxides, including MnxFe3−xO4 and (MnO)y(FeO)1−y, generated during the reduction of MnO2-Fe2O3 system.

XRD, BET, SEM, and EDS spectrum analysis stated that the treated minerals contained cerium oxides and Fe−Ce composite oxides.

The key topics include (1) single phase SMONs including both n-type and p-type ones; (2) noble metal nanoparticle and metal ion modified SMONs; (3) composite oxides of SMONs; (4) composites of SMONs with carbon nanomaterials.

Pt catalysts supported on a series of CrxFe2-xO3 composite oxides with different Cr/Fe molar ratios were prepared and tested for CO oxidation.

A series of amorphous TiO2–SiO2 composite oxides with different TiO2 contents were prepared by a one-step co-precipitation process as catalysts for selective oxidation of styrene to 1, 2-epoxyethylbenzene with aqueous hydrogen peroxide in acetonitrile.

The composite exhibits a stable permeation performance in the oxygen-transport membrane during over 150 h operation at 800 and 700 °C, confirming the potential of intermediate-temperature oxygen-transport membranes for air separation and providing insight for designing thermally stable composite oxides.

A series of three-dimensional ordered macroporous (3DOM) Ce-Fe composite oxides are synthesized for selective catalytic reduction of NOx by CO.

The mixtures of raw materials are calcined at 400 °C firstly to form the composite oxides which are then reacted with insufficient carbon black at 1050 °C for 2 h.

2O2 (NCM622) powders with Li-Zr composite oxides coating layers are synthesized by solid-state reaction using Ni0.

Raman spectroscopy and glancing angle x-ray diffraction (GAXRD) measurements indicated the formation of composite oxides of anatase TiO2 and monoclinic Nb2O5.

Rh substituted-La2B2O7 (B = Zr or Ti) composite oxides were synthesized and applied in the dry reforming of methane (DRM) reaction.

The results show that after the addition of K, the synergistic effect between Ni and Mn/Fe weakens, and the redox capability decreases, due to the decrease in NiO/Ni, Fe3+, Mn4+, lattice oxygen ratio, unsaturated Ni atom content on the catalyst surface and structure defects of Ni–Mn/Fe composite oxides.

We have studied transport properties of composite oxides composed of ferrimagnetic conductor Fe 3O 4 (magnetite) and insulating α-Fe 2O 3 (hematite) at room temperature.

Based on a modified impregnation-calcination strategy, a series of MgOx-Al2O3 composite oxides with different crystal structures from mixed phase to pure spinel was prepared.

Copper and zinc composite oxides (Cu2O/ZnO) were synthesized by an impregnation-reduction-air oxidation method.

The low ignition resistance of Ti-6Al-4V probably results from not only the composite oxides of TiO2, Al2O3 and V2O5 generating during ignition which could not prevent the rapid interaction between Ti and O, but also the Al and V elements in the heat-affected zone which could not stop or slow the massive diffusion of O towards the alloy.

A series of MgAl hydrotalcite-derived composite oxides were prepared by co-precipitation methods.

The promotional effect of precious metals in composite oxides has been observed in several catalytic reactions.

But there has been no report about intergrown multi-phase composite oxides for separator modification.

These catalysts can be classified into five categories, namely single manganese oxide, Mn-based composite oxides, Mn-based special oxides, supported Mn-based oxides, and Mn-based monoliths.

The rare earth elements initially presented in bastnaesite and monazite were gradually converted to rare earth hydroxides (RE(OH)3), rare earth oxides (RE2O3), and composite oxides (Ce0.

Cobalt carbide (Co2C) nanoprisms derived from CoMn composite oxides exhibit promising catalytic performance for Fischer–Tropsch to olefins (FTO) synthesis via H2-lean syngas conversion, but with nearly 45 C% of CO2 selectivity.

The catalytic activities of CeO2-MnOx composite oxides synthesized through oxalate method were researched.

In this work, lanthanum-cobalt composite oxides were prepared by using the co-precipitation method, and toluene was used as the model compound.

In order to obtain a stable and high capacity Li-rich composite oxides cathode with layered structure, it is important to investigate and to improve the electrochemical properties of Li2MnO3 with a systematic study.

A series of Au-supported cerium oxide binary composite oxides doped with different metals (M = Mn, Cu, Ni, and Co) were synthesized and applied to the oxidative esterification of methylacrolein (MAL) with methanol (MeOH) to methyl methacrylate.

Herein, magnetic Mg–Al composite oxides (Fe3O4@Mg–Al–O) as an effective adsorbent were successfully prepared.

Bismuth-based composite oxides are always considered the best visible-light photocatalysts for oxygen production.

CoxFe1-xAl2O4+δ composite oxides were prepared using a sol-gel method with glucose as hard template.

35O3, Co nanoparticles could be confined into the K-modified La-Ga-O composite oxides, and the confinement of La-Ga-O could improve the anti-sintering performance of Co nanoparticles.

Solar selective absorber coatings, combining of nanostructured, ternary transition metal spinel structure and composite oxides were prepared by a series of transition metal (Co, Ni and Cu) based nitrate salts.

By means of activity tests and relative physico‐chemical characterizations, the factors affecting the activity of those Mn‐Ni composite oxides were explored.

Catalytic hydrolysis of carbonyl sulfide (COS) over metal frameworks derived MgAlCe composite oxides catalyst is investigated under N2 and CO atmosphere.

In this study, a series of Co–Mn composite oxides with different Co/Mn molar ratios grown on interconnected Ni foam are prepared as monolithic catalysts for total toluene oxidation, in which Co1.