Abstract
Temperature programmed desorption (TPD) is a powerful surface analytical technique used for studies of adsorbate systems when background effects such as desorption from the mounting wires and/or the heater assembly can be minimized. Researchers often use TPD measurements to determine the desorption characteristics of field generated, real-life samples that have been prepared under ambient conditions. Since real-life samples are generated under ambient conditions, the potential for background effects is significantly enhanced. In many cases, background effects and their implications on data analysis are not considered. It will be demonstrated that background effects are very significant for real-life, field generated samples when traditional protocols are used for TPD measurements. We have devised a novel experimental protocol to reduce background effects during TPD measurements of field generated, real-life powdered samples. The novel experimental apparatus and procedures will be described. TPD spectra measured using the new protocol will be compared with spectra measured using traditional protocols.
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