Carbon monoxide sensor having mercury doped electrodes
First Claim
1. A carbon monoxide sensor, for measuring carbon monoxide in flue gases, the carbon monoxide sensor comprising:
- a working electrode of platinum black;
a counter electrode of platinum black;
a reference electrode of platinum black;
each of the working electrode, and reference electrode including a carbon monoxide contacting surface;
an electrolyte connected with the working electrode, the counter electrode and the reference electrode; and
two layers enriched by mercury and/or mercury ions, one on the carbon monoxide contacting surface of the working electrode and one on the carbon monoxide contacting surface of the reference electrode.
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Accused Products
Abstract
In this carbon monoxide sensor, particularly for measuring carbon monoxide in flue gases, which must be operated in a controlled-potential bias circuit and which comprises a working electrode, a counter electrode, and a reference electrode, all of platinum black, as well as an electrolyte connected with these three electrodes, the hydrogen cross-sensitivity is drastically reduced by providing two layers enriched by mercury and/or mercury ions, one on a surface of the working electrode and one of a surface of the reference electrode. These two electrodes are treated with mercury or a mercury compound before or after incorporation into the sensor.
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Citations
6 Claims
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1. A carbon monoxide sensor, for measuring carbon monoxide in flue gases, the carbon monoxide sensor comprising:
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a working electrode of platinum black; a counter electrode of platinum black; a reference electrode of platinum black;
each of the working electrode, and reference electrode including a carbon monoxide contacting surface;an electrolyte connected with the working electrode, the counter electrode and the reference electrode; and two layers enriched by mercury and/or mercury ions, one on the carbon monoxide contacting surface of the working electrode and one on the carbon monoxide contacting surface of the reference electrode. - View Dependent Claims (2)
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3. A method of manufacturing a carbon monoxide sensor, for measuring carbon monoxide in flue gases, the carbon monoxide sensor comprising
a working electrode of platinum black; -
a counter electrode of platinum black;
a reference electrode of platinum black;
each of the working electrode, counter electrode and reference electrode including a carbon monoxide contacting surface, andan electrolyte connected with the working electrode, the counter electrode, and the reference electrode;
said method comprising the step of treating the carbon monoxide contacting surfaces of the working electrode and the reference electrode with mercury or a mercury compound. - View Dependent Claims (4, 5, 6)
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Specification