Pitfalls in Interpreting Temperature Programmed Desorption Spectra of Alloys: The CO/CoPt Puzzle

Abstract

CO adsorption: Strong shifts in temperature-programmed desorption spectra may occur for alloys with respect to pure compounds as is demonstrated for CO adsorption on a CoPt surface (see figure). A correct interpretation of the data is only possible when corroborated with DFT calculations and a further experimental method such as IR reflection absorption spectroscopy.