Electrochemical oxygen sensor

Courouau, J.-L. (2004) Electrochemical oxygen sensors for on-line monitoring in lead-bismuth alloys status of... 

The first concept is the closed-loop-controlled three-way catalyst. In this, one type of catalyst, which is placed in the exhaust gas stream, is able to promote all the main reactions that lead to the simultaneous removal of carbon monoxide, hydrocarbons and nitrogen oxides. To balance the extent of the oxidation and the reduction reactions, the composition of the engine-out exhaust gas is maintained at or around stoichiometry. This is achieved by a closed-loop engine operation control, in which the oxygen content of the engine-out exhaust gas is measured up-stream of the catalyst with an electrochemical oxygen sensor, also called lambda sensor. 

FIGURE 4.17 Equivalent electrical circuit for electrochemical oxygen sensor a at the absence of polarization and b polarization of the solid electrolyte-electrode interface. (From Zhuiykov, S., In-situ" diagnostics of solid electrolyte sensors measuring oxygen activity in melts by developed impedance method, Meas. Sci. Technol. 17 (2006) 1570-1578. With permission.)... 

Mortimer, A.G. and Reed, G.R, Development of a robust electrochemical oxygen sensor, Sens. Actuators B Chem. 24 (1995) 328-335. 

The highly conducting Zr02 crystalhzes in the fluorite structure, which stabilizes by doping with Y2O3 or CaO. Zr02 is used in several electrochemical developments, e.g., as electrolyte in solid oxide fuel cells (SOFCs) or for an electrochemical oxygen sensor in the car industry (A,-probe). 

Amperometry, Fig. 7 Miniaturized membrane-covered electrochemical oxygen sensor for biomedical investigations in small measuring volumes... 

Electrochemical Oxygen Sensors for Operation at Ambient Temperature... 

Electrochemical Oxygen Sensors for Operation at Ambient Temperature, Table 1 ambient temperature [10] Oxygen scrnsras opt tes at ... 

Yamazoe N, Miura N (1990) Sohd-state electrochemical oxygen sensors for operation at room temperature. Trends Anal Chem 9(5) 170-175... 

The first solid electrolyte electrochemical oxygen sensors of the USSR were developed in the institute. Also, for the first time in the USSR, the oxygen permeability of the solid electrolytes with dominant ionic conductivity and negligible electronic conductivity as well as of electronic conductors with small ionic conductivity was investigated (see, for instance, [8,19]). The method for measuring the oxygen permeability was later patented under the name Arzhannikov s method for determination of partial conductivities of solid electrolytes (SU patent 1208501,30.01.86). 

Gilderman VK, Zemtzov VI, Pal guyev SF (1989) Europium chromite doped with calcium for electrochemical oxygen sensors. Sens Actuators 18 115-116... 

Mobius H-H, Zhuk PP, Jakobs S, Hartung R, Guth U, Sandow H, Vecer AA (1990) Investigation of electrochemical oxygen sensors with solid electrolytes and oxide powder electrodes. Soviet Electrochem 11 1235-1243, Translated... 

An alternative to gas chromatography is an electrochemical oxygen sensor. These inexpensive probes are commonly used in laboratories for atmospheric determination of oxygen. Connection of this probe to a sensitive multimeter dlows for probe utilization under vacuum, eliminating the need for transport of gases to a separate analytical system. 

Preidel W, Rao JR, Mund K, Schunck O, David E (1995) A new principle for an electrochemical oxygen sensor. Sens Actuators B 28 71-74... 

The experimental apparatus is shown schematically in Fig. 3.5. This system uses a solid-state electrochemical oxygen sensor and an oxygen pump to measure and control the oxygen partial pressure in an enclosed reaction system. Our previous results showed that this system can be used to control... 

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