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Therefore, oxidation of NO into NO2 at low temperature even room temperature is a prospective high-efficiency step for the removal of NO. In particular, it is practicable to remove NO in air at ambient temperature in the presence of water vapor, thus much attention has been paid to the oxidation of NO into NO2[5], [6] and [7].

However, it is difficult to oxidize NO into NO2 in air, for NO concentration even in serious polluted air is far less than 0.1%, and NO of low concentration below 0.1% is very inactive [8] and [9].

[8]
M. Bodenstein
Helvetica Chimica Acta, 18 (1935), pp. 743¨C759

Full Text via CrossRef
[9]
F.A. Cotton, G. Winlkinson
Advanced Inorganic Chemistry
Interscience, New York (1972) 355 p.
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