Infrared spectroscopy study of nitrogen adsorption

The nitrogen adsorption states were studied by various instruments and spectroscopy techniques. Table 2.1 lists some infrared spectroscopy data of nitrogen adsorption. The adsorbed species observed at room temperature could be desorbed at high temperatures, which is short-lifetime intermediate species in ammonia synthesis. As mentioned above, if nitrogen must be dissociated before reaction with hydrogen, in reaction mechanism, the main adsorbed species N (a) is more important than the species N2 (a). However, N2 (a) also can give important information, i.e., how N2 is activated and converted to dissociated adsorbed species N (a). 

Metal Support Wavelength/ cm Difference from dinitrogen gas/cm Adsorption heat/ kJ-mol  

A stably activated dinitrogen molecular species at 2,020cm is found by IR on RU-K/AI2O3 at 473 K after N2 treatment and can be converted to ammonia in the 

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