Here we investigate the oxidation of Co(OH)2 using the catalysis cell. The catalysis cell allowed us to treat the sample under high temperature high pressure conditions similar to those found in industrial reactors. Careful analysis of the XPS spectra generated after each successive treatment shows that once calcined above 200 ºC the surface of the catalyst changes from hydroxide to oxide. Peak fitting the Co 2p region identified Co to be present as Co3O4.
Overlapping photoelectron lines and Auger features are a common problem in analysis of complex materials. The standard approach of switching to an achromatic Mg X-ray source is sometimes undesirable due to the introduction of X-ray satellites into the spectrum. In this example we show how Kratos’ automatic monochromatic Ag Lα X-ray source may be used to excite a satellite free spectrum and allow unambiguous determine the oxidation state of a Ni/Co/Mn alloy.
Application Note on the reduction in preferential sputtering of TiO2.