In situ DRIFT study of hydrogen and CO adsorption on Pt/SiO2 model sensors

Author

Becker, Elin ; Skoglundh, Magnus ; Andersson, Mike ; Spetz, Anita Lloyd

Author_Institution

Chalmers Univ. of Technol., Goteborg

fYear

2007

fDate

28-31 Oct. 2007

Firstpage

1028

Lastpage

1031

Abstract

The sensing mechanism towards carbon monoxide of metal insulator silicon carbide (MISiC) field effect devices used as sensors, has been studied by in situ FTIR spectroscopy in diffuse reflectance mode (DRIFT). The infrared studies were performed using a model sensor, where adsorption of CO in presence of oxygen and hydrogen has been studied. The results show that the CO adsorption on Pt varies with varying oxygen concentration, CO concentration, hydrogen exposure and temperature. When correlating the DRIFT spectroscopy with sensor signal measurements, the CO response of MISiC field effect devices appears to be connected to the CO coverage of the sensor surface.

Keywords

field effect devices; gas sensors; infrared spectroscopy; DRIFT spectroscopy; FTIR spectroscopy; diffuse reflectance mode; hydrogen adsorption; metal insulator silicon carbide field effect devices; model sensor; sensor signal measurements; Biological system modeling; Chemical and biological sensors; Gas detectors; Hydrogen; Metal-insulator structures; Sensor phenomena and characterization; Silicon carbide; Silicon compounds; Spectroscopy; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2007 IEEE

Conference_Location

Atlanta, GA

ISSN

1930-0395

Print_ISBN

978-1-4244-1261-7

Electronic_ISBN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2007.4388580

Filename

4388580