Copper Oxide Based Catalysts


Copper oxides deliver interesting morphological architectures of the plate-, needle-, and wire-shaped particles or nano cuboids, nanoplatelets, nanorods, and nanobelts with preferable crystal plane orientation. Such CuO structures with anisotropic crystal orientation showed morphological and geometric dependency on O2 adsorption capabilities and their oxidation activity, i.e., in the benzene combustion, in the following order: f(200) > (111) > (011) > (001).Al2O3@CuO core-shell submicron spheres with uniform cell distribution of CuO nanoparticles showed a significantly improved activity compared with conventional supported CuO/Al2O3 in CO oxidation. Tang and his team demonstrated morphology-dependent interactions of Cu nanoparticles over ZnO in the selective hydrogenation of CO2 to methanol. The ZnO plate's exposed polar (002) facet exerted a stronger electronic interaction with Cu than other crystal facets, improving CO2 selective hydrogenation performance. Similarly, Cu nanoparticles over the CeO2 catalyst prepared using pulsed arc plasma deposition existed in various states according to the deposition method [220]. Their study over CO oxidation concluded that dispersion and interaction with the CeO2 support are crucial. Other Cu-containing mixtures have also been reported, e.g., by sol-gel or sonochemistry but without catalytic characterization. Huang et al. Reviewed the facet-dependent properties of oxide nanocrystals with cubic crystal structures and well-controlled polyhedral morphologies exposing (100), (111), and (110) surfaces. In synthesizing 1,2,3-triazoles by multicomponent click reactions of alkynes, organic halides, and NaN3, catalytic properties have been reported to be facet-dependent on Cu2O cubes, octahedrons and rhombic dodecahedrons of the same total SSA. Rhombic dodecahedral Cu2O nanocrystals have been consistently more active than Cu2O octahedrons for all three reactions examined. Cu2O nanocubes exhibited the lowest catalytic efficiency. The high catalytic activity of Cu2O rhombic dodecahedrons was related to the fully exposed surface Cu atoms on the {110} facet. CuO nanoclusters supported on CeO2 nanospheres showed increased activity in N2O decomposition for 25 mol% Cu. This was the optimum loading and dispersion as a higher content led to less active segregated CuO nanophase formation. However, no morphology relation was discussed. If you are looking for high quality, high purity, and cost-effective Copper oxide, or if you require the latest price, please email contact mis-asia.

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