| 摘要 |
The present invention provides a catalyst selectively oxidizing carbon monoxide in a mixed gas comprising carbon monoxide and hydrogen as well as a catalyst selectively oxidizing hydrogen. A catalyst selectively oxidizing carbon monoxide is obtained by dispersing platinum black on a surface of a base metal compound oxide including Co2O3, MnO2, CuO, and Cr2O3, and forming an Ag2O layer on the platinum black layer. The catalyst selectively oxidizing hydrogen in a mixed gas comprising carbon monoxide and hydrogen is obtained by dispersing Ag2O on a surface of said base metal compound oxide and further forming a platinum black layer on the Ag2O layer. In addition the present invention provides a contact combustion carbon monoxide sensor not having the sensitivity to hydrogen as well as that not having the sensitivity to carbon monoxide.
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