The surface chemistry of CN and H on Pt(111)

被引：40

作者：

Jentz, D ^{[1
]}

Mills, P ^{[1
]}

Celio, H ^{[1
]}

Trenary, M ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT CHEM,CHICAGO,IL 60607

来源：

SURFACE SCIENCE | 1996年 / 368卷

基金：

美国国家科学基金会;

关键词：

cyanogen; hydrogen cyanide; infrared absorption spectroscopy; low index single crystal surfaces; models of surface chemical reactions; platinum; surface chemical reaction; vibrations of adsorbed molecules;

D O I：

10.1016/S0039-6028(96)01075-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Through a series of studies using reflection absorption infrared spectroscopy (RAIRS), we have observed some common trends in the surface chemistry of CN-containing adsorbates on Pt(111). The molecules that have been studied include azomethane (CH3N2CH3), methylamine (CH3NH2), hydrogen cyanide (HCN), cyanogen (C2N2), and acetonitrile (CH3CN). We find that HCN decomposes to yield adsorbed CN, which subsequently hydrogenates to form aminomethylidyne, CNH2. The aminomethylidyne species also forms from the thermal decomposition of azomethane and methylamine, but not from acetonitrile. Molecularly adsorbed cyanogen, C2N2, hydrogenates to form H2NCCNH2. Thus the CNH2 functionality seems to have high stability on the Pt(111) surface. Detailed interpretation of the various RAIRS results required extensive use of isotopic substitution, normal-mode analyses, and an understanding of the effects of adsorbate-adsorbate interactions on the spectra.

引用

页码：354 / 360

页数：7