Diffusion Mechanisms for Ions over Hydroxylated Surfaces: Cu on γ-Al2O3

N2O Decomposition over Cu–Zn/γ–Al2O3 Catalysts

Cu–Zn/γ–Al2O3 catalysts were prepared by the impregnation method. Catalytic activity was evaluated for N2O decomposition in a fixed bed reactor. The fresh and used catalysts were characterized by several techniques such as BET surface area, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The Cu–Zn/γ–Al2O3 catalysts exhibit high activity and stability for N2O decomposition in mi...

Hydroxylated a-Al2O3 (0001) surfaces and metal/a-Al2O3 (0001) interfaces

X-ray photoelectron spectroscopy was applied to study the hydroxylation of a-Al2O3 (0001) surfaces and the stability of surface OH groups. The evolution of interfacial chemistry of the a-Al2O3 (0001) surfaces and metal/a-Al2O3 (0001) interfaces are well illustrated via modifications of the surface O1s spectra. Clean hydroxylated surfaces are obtained through waterand oxygen plasma treatment at ...

Energetics and many-particle mechanisms of two-dimensional cluster diffusion on Cu„100... surfaces

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Elimination of formaldehyde over Cu-Al2O3 catalyst at room temperature.

Catalytic elimination of formaldehyde (HCHO) was investigated over Cu-Al2O3 catalyst at room temperature. The results indicated that no oxidation of HCHO into CO2 occurs at room temperature, but the adsorption of HCHO occurs on the catalyst surface. With the increase of gas hourly space velocity (GHSV) and inlet HCHO concentration, the time to reach saturation was shortened proportionally. The ...

Accommodation and diffusion of Cu deposited on flat and stepped Cu(111) surfaces.