Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
747415 | Sensors and Actuators B: Chemical | 2006 | 6 Pages |
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 870Â 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
Authors
Georgios Kyriakou, David J. Davis, Richard M. Lambert,