The hierarchical macro-mesoporous silica (MMS) was used for a first time as support catalysts oxidation reactions. synthesized by the emulsions templating mechanism and modified separately or simultaneously using cobalt manganese oxides. obtained materials were characterized different physicochemical methods tested in of CO n-hexane combustion modification MMS does not change significantly meso...

The research presented in this paper addresses the question: How does addition of a small amount LaCoO3 impact activity Co3O4 catalyst? By testing such catalyst N2O decomposition under conditions at which thermal to CoO is possible, one gains unique insight into how two phases interact. increases entire studied temperature range, unlike undoped cobalt lower 850 °C than 800 due reduction CoO. XR...

In this research work, we report a simple method called reflux condensation method for synthesizing Co3O4 nanoparticles using cheap chemicals such as, cobalt acetate (precursor salt), sodium monododecyl sulphate - SDS (surfactant) and N, N - Dimethylformamide - DMF (solvent). The prepared materials were heat treated at 200, 400, 600 and 800 oC for each 2 h to get phase pure product. The calcine...

The surface crystal structure of the Co3O4(1 1 0) spinel was characterized by low energy electron diffraction (LEED), X-ray photoelectron spectroscopy (XPS), and Auger electron spectroscopy (AES). Well-defi ned LEED diffraction patterns showed an unreconstructed Co3O4(1 1 0) surface in Type A termination, and XPS and Auger indicated the surface to be stoichiometric with octahedral and tetrahedr...

Nano oxides of Manganese Nickel and Cobalt Nickel were synthesized by chemical coprecipitation method from the reaction of respective metal sulfides of manganese, nickel, cobalt and sodium carbonate using ethylene diamene tetra acetic acid as an effective capping agent. The carbonate precursors were heated at different temperatures so as to form their oxides. Through the X-ray line broadening t...

Highly efficient and chemically compatible LnxSr1-xCoO3-delta (Ln = La, Sm, Gd, ...)/Co3O4 electrocatalysts for oxygen reduction reaction are presented and the very low cathode polarization resistances and excellent performances implied their promising application for developing intermediate-temperature solid oxide fuel cells (SOFCs), as well as potential application for oxygen separation membr...

A facile in situ vapour phase hydrothermal (VPH) surface doping approach has been developed for fabrication of high performance S-doped Co3O4 electrocatalysts with an unprecedentedly high surface S content (>47%). The demonstrated VPH doping approach could be useful for enrichment of surface active sites for other metal oxide electrocatalysts.

The development of water oxidation catalysts (WOCs) to replace costly noble metals in commercial electrolyzers and solar fuel cells is an unmet need that is preventing the global development of hydrogen fuel technologies. Two of the main challenges in realizing catalytic water splitting are lowering the substantial overpotential that is required to achieve practical operating current densities ...

Metal oxide nanoparticles are of practical interest in a variety of applications including high-density information storage [1], magnetic resonance imaging [2] and targeted drug delivery [3]. Many of these applications require particles of predetermined size and narrow size distribution. Processes that lead to particles with these characteristics are therefore of considerable interest. Cobalt f...

The synthesis of Co and Ce oxide nanoparticles using precipitation precursor salt solutions in the form microdroplets generated with a nebulizer proved to be an efficient, fast inexpensive method. Different morphologies single oxides particles were obtained. Ceria almost cube-shaped 8 nm average size, forming 1.3–1.5 μm aggregates, whereas cobalt appeared as rounded-edged 37 mainly nanorods 50–...