Electrochemical NOx Sensors for Emission Control of Automotive Exhaust Gas Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”

Format:

Book

Conference/Event

Author/Creator:

Grilli, Marialuisa, author.

Conference Name:

Automotive and Transportation Technology Congress and Exposition (2001-10-01 : Barcelona, Spain)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

Electrochemical NOx sensors for emission control of automotive exhaust gas were prepared coupling pellets of yttria-stabilized zirconia (YSZ), an oxygen ion conductor, with thick films of a semiconducting oxide (WO3) as an auxiliary phase. The obtained sensors were wholly exposed to the same atmosphere. Electromotive force (EMF), polarization curves and amperometric measurements were performed in air and at different concentrations of NO2 in air, at selected temperatures. Stable EMF values and fast response times were obtained. The sensors showed non-linear polarization curves. The role played by the electrolyte/electrode interface was determined by electrochemical impedance spectroscopy (EIS) tests: exposure to NO2 did not affect the bulk but only the electrolyte/electrode interface

Notes:

Vendor supplied data

Publisher Number:

2001-01-3281

Access Restriction:

Restricted for use by site license