Abstract
Abstract The Hg-photosensitized reaction of a mixture of H2 and NO has been studied mainly at room temperature. The quantum yield of the H2O formation is nearly unity, independent of the pressures of both H2 and NO. The quantum yield of the N2 formation is proportional to the NO pressure, while that of N2O decreases with the NO pressure; both of them are independent of the H2 pressure. In order to interpret the results concerning the H2O formation, the following process is proposed: (i) NO3+NO→2NO2 NO2+HNO→OH+2NO OH+HNO→H2O+NO in addition to the well-established H2O-forming process: (ii) 2HNO→H2O+N2O NO2, one of the reactants in Process (i), is formed by the chain process proposed by Arden and Phillips: (iii) H+NO+M→HNO+M HNO+2NO→N2+H+NO3 The (ii) and (iii) processes also coincide with the results of the N2O and N2 formations respectively.
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