US 12,222,311 B2
Selective real-time gas sensing
Xiangqun Zeng, Rochester Hills, MI (US); and Yongan Tang, Huntley, IL (US)
Assigned to Oakland University, Rochester, MI (US)
Filed by Oakland University, Rochester, MI (US)
Filed on Dec. 6, 2022, as Appl. No. 18/076,123.
Application 18/076,123 is a division of application No. 16/123,643, filed on Sep. 6, 2018, granted, now 11,567,031.
Claims priority of provisional application 62/556,144, filed on Sep. 8, 2017.
Prior Publication US 2023/0109455 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 27/404 (2006.01); G01N 27/407 (2006.01)
CPC G01N 27/4045 (2013.01) [G01N 27/407 (2013.01); F01N 2560/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A selective, real-time gas sensing method, comprising:
supplying an atmospheric gas sample to an interface between a working electrode and an ionic liquid electrolyte, wherein the working electrode is to sense a specific gas molecule, and wherein the ionic liquid electrolyte is selected from the group consisting of 1-ethyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-propyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-pentyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-hexyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-heptyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-octyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-nonyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-decyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, and a combination thereof;
based on at least one unique electrochemical reaction of the specific gas molecule to be sensed, implementing a driving force to initiate a series of reactions involving the specific gas molecule; and
in response to the implementation of the driving force, monitoring for a signal indicative of the specific gas molecule;
wherein the atmospheric gas sample is supplied continuously for at least 30 seconds and wherein the implementing of the driving force and the monitoring for the signal indicative of the specific gas molecule are performed continuously as the atmospheric gas sample is supplied.