Response of a thermocatalytic sensor with a single-crystal silicon heater

Autor:	V. V. Khatko, I. A. Taratyn
Rok vydání:	2012
Předmět:	Materials science Physics and Astronomy (miscellaneous) Hydrogen Silicon Analytical chemistry chemistry.chemical_element Hydrogen sensor Methane Catalysis Hydrogen sulfide sensor chemistry.chemical_compound chemistry Propane Carbon monoxide
Zdroj:	Technical Physics. 57:1726-1729
ISSN:	1090-6525 1063-7842
DOI:	10.1134/s1063784212120274
Popis:	The sensor response of a thermocatalytic gas sensor with a heater made of single-crystal p-type silicon to gases H2, CO, CH4, and C3H8 is studied. The sensor response to propane, carbon monoxide, and hydrogen has positive and negative components. The positive sensor responses to carbon monoxide and propane exhibit well pronounced maxima at silicon heater currents of 21 and 23 mA, respectively. For hydrogen, the maximum sensor response depends on the gas concentration. This specific feature of the sensor response to hydrogen is explained by the sequential action of the following two processes: absorption of H2 molecules on the silicon heater surface and the catalytic oxidation of hydrogen on a Pt-Pd catalyst. The sensor response to methane only has a negative component.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0229d07cacbb43fb808883d4b6860ae9 https://doi.org/10.1134/s1063784212120274 Zobrazit plný text záznamu Plný text ve formátu PDF