Isocyanate formation from adsorbed carbon monoxide and ammonia or hydrazine on vanadium, iron, and nickel

Abstract

Adsorption of NH3 on V or Fe at 25° followed by exposure to 30 Torr of CO produces infrared bands for CO, NH3, and an isocyanate complex on the surface. Assignments are confirmed by isotope shifts using 15NH3, ND3, and C18O. The reverse order of addition of CO and NH3 does not give the isocyanate complex. Use of N2H4 in place of NH3 produces identical results and no evidence of a surface species containing N-N bonds. On Ni adsorption of CO and NH3 or N2H4 does not give an isocyanate complex. Exposure of Ni with preadsorbed N2H4 to CO produces adsorbed NH3 which is not given by N2H4 alone while the reverse order of addition gives a chemisorbed hydrazine complex containing a N-N bond.

Department(s)

Chemistry and Biochemistry

Document Type

Article

DOI

https://doi.org/10.1021/j100582a020

Publication Date

1-1-1975

Journal Title

Journal of Physical Chemistry

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