Suppression of nitrogen oxide dissociation by gold on Pt(335)

Article Abstract:

Temperature-programmed desorption method is used to analyze the working of prototype NO (sub x) sensors when Au/Pt electrode is present in automotive exhaust. Study of dissociation reaction of NO and O2 on Pt(335) and on partially Au covered Pt(335) report that the Au/Pt electrode in a NO (sub x) sensor is able to dissociate oxygen 10(super 3) times more efficiently than NO, which give indication for the development of new emission control systems.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Gold, Analysis, Electric properties, Electrodes, Dissociation, Dissociation reactions

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Oxidation of CO on gold-covered Pt(335)

Article Abstract:

A study was conducted to analyze the absorption and reaction of oxygen and carbon monoxide on a stepped platinum surface with different amounts of gold. Temperature-programmed desorption and reaction and low-energy electron diffraction were utilized to carry out the analysis. High-resolution electron energy loss spectroscopy was also used to determine the absorption and reaction properties. Results indicated the existence of completely gold-covered regions and regions with gold on the step edges.

Research, Oxidation-reduction reaction, Oxidation-reduction reactions, Carbon monoxide

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