A simple method for obtaining a comprehensive overview of major compounds desorbing from the surface during temperature programmed desorption (TPD) experiments is outlined. Standard commercially available equipment is used to perform the experiment. The method is particularly valuable when high molecular mass compounds are being studied. The acquisition of contour temperature programmed desorption (CTPD) spectra, sampling 50-dalton mass ranges at a time in the thermal desorption experiments, is described and demonstrated for the interaction of benzotriazole adsorbed on a Ni(111) surface. Conventional two-dimensional TPD spectra can be extracted from the CTPD by taking vertical slices of the contour.
C. C. Chusuei et al., "Contour Temperature Programmed Desorption for Monitoring Multiple Chemical Reaction Products," Review of Scientific Instruments, vol. 70, no. 9, pp. 3719-3722, American Institute of Physics (AIP), Sep 1999.
The definitive version is available at https://doi.org/10.1063/1.1149983
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© 1999 American Institute of Physics (AIP), All rights reserved.
01 Sep 1999