Abstract
The adsorption and surface reactions of acetonitrile on Al 2O 3-supported noble metal (Pt, Rh, Au) catalysts at 300–673 K were studied by FT-IR and mass spectrometry. It was found that acetonitrile adsorbs molecularly in different forms on these surfaces: besides the H-bridge-bonded and physisorbed forms monodentate CH 3CN (on strong and weak Lewis acid sites) and η 2(C, N)CH 3CN-adsorbed species were formed at 300 K. CH 3CN, on the other hand, dissociates producing CN (a) species even at this temperature. Among the gas phase products formed during the heat treatments of adsorbed CH 3CN layer methylamine (CH 3NH 2) was detected, the amount of which depended on the nature of the surfaces. The appearance of gas phase NH 3 can be connected with the rupture of C N bond in CN (a). In the presence of oxygen the formation of isocyanate (NCO) surface species was observed on Pt/Al 2O 3, Rh/Al 2O 3 and (in a very small extent) on Al 2O 3 at and above 473 K; no NCO formation was found on Au/Al 2O 3.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
