14915-07-2Relevant articles and documents
MULTIPLE CHARGE-TRANSFER REACTIONS IN ZIRCONIA ELECTROLYTIC CELLS: NOx REDUCTION ON PLATINUM.
Gessner,Nagy,Michaels
, p. 1294 - 1301 (1988)
This paper investigates the electrochemical activity of nitrogen, NO, and NO//2 on platinum paste electrodes in zirconia oxygen sensors. Open-circuit voltages and steady-state current-voltage characteristics were measured at 600 degree -800 degree C as a function of the partial pressures of oxygen, nitrogen, and nitrogen oxides. The open-circuit voltage and the current density both increased monotonically with the NO and NO//2 pressures in the sensor feed stream; both were most sensitive to the NO//2 concentration. These data are well described by a reaction network in which two parallel charge-transfer reactions occur on platinum: oxygen reduction to oxygen dianions; and NO//2 reduction to NO and oxygen dianions.
