Article ID Journal Published Year Pages File Type
747415 Sensors and Actuators B: Chemical 2006 6 Pages PDF
Abstract
X-ray photoelectron spectroscopy (XPS) and temperature-programmed reaction (TPR) were used to investigate the suitability of polycrystalline platinum as a sensing electrode for sensitive and selective detection of hydrocarbons in a vacuum environment by electrochemical means. At 870 K, all the species investigated undergo precursor-mediated dissociative adsorption to yield graphite, though at widely different rates. It is found that polycrystalline platinum discriminates effectively between “sticky” hydrocarbons such as alkenes, aromatics and alkanes >C5 on the one hand, and “benign” low molecular weight alkanes on the other. The proposed methodology offers a promising way forward with respect to the intended application.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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