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The activity of supported Ni catalysts can easily be affected by high temperatures and oxidative atmosphere. In order to study the origin of this behaviour, we performed systematic LEED and XPS investigations on a model system prepared by physical vapour deposition of Ni on a thin epitaxial alumina film on NiAl(110). Annealing experiments showed that deposited Ni is thermally stable up to ∼370K. Further...
X-ray photoelectron spectroscopy was applied to study the hydroxylation of α-Al 2 O 3 (0001) surfaces and the stability of surface OH groups. The evolution of interfacial chemistry of the α-Al 2 O 3 (0001) surfaces and metal/α-Al 2 O 3 (0001) interfaces are well illustrated via modifications of the surface O1s spectra. Clean hydroxylated surfaces are...
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