Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (03): 313-320.doi: 10.3866/PKU.WHXB19920307

• ARTICLE • Previous Articles     Next Articles

The Adsorption and Reaction of Acetonitrile and Benzonitrile on Cu(111) and Pd(100)

Feng Wei-Min   

  1. Graduate School, USTC,Academica Sinica, Beijing 100039
  • Received:1990-11-29 Revised:1991-05-27 Published:1992-06-15
  • Contact: Feng Wei-Min

Abstract: Adsorption and reaction of acetonitrile (CH_3CN) and benzonitrile (C_6H_5CN) on clean and oxygen covered Cu(111) and Pd(100) surface have been studied by HREELS. At 198 K the CH_3CN molecule rehybridized and chemisorbed on Cu(111) and Pd(100) by di-σ-bonds with carbon and nitrogen atom parallelly to the surface. The chemisorbed species, CH_3-C=N, showing a week loss at 196 meV. The HREEL spectra of C_6H_5CN adsorbed on Pd(100) and Cu(111) are indicative of molecularly adsorbed C_6H_5CN, with the ring plane and the CN group parallelled to the surface at 198 K. The preadsorption of oxygen enhancing the adsorption of CH_3CN and C_6H_5CN on Pd(100) surface was not found. The adsorption of C_6H_5CN on oxygen covered Cu(111) surface results in species with a strong mode at 173 meV, suggesting an N-bonded oxide (—C=N=O). Similar reaction with CH_3CN is supposed.

Key words: HREELS, Acetonitrile, Benzonitrile, Adsorption, Clean and oxygen covered Cu(111) and Pd(100)