Formation and reactions of CH3 species over Mo2C/Mo(111) surface

被引：58

作者：

Solymosi, F

Bugyi, L

Oszkó, A

机构：

[1] Attila Jozsef Univ, Inst Solid State & Radiochem, H-6701 Szeged, Hungary

[2] Hungarian Acad Sci, React Kinet Res Grp, H-6701 Szeged, Hungary

来源：

CATALYSIS LETTERS | 1999年 / 57卷 / 03期

关键词：

methyl iodide; methyl; Mo(2)C; C-H bond activation; CH(2) coupling; aromatization of methane; reaction pathway;

D O I：

10.1023/A:1019095515497

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：

The reaction pathways of adsorbed CH(3) on the Mo(2)C/Mo(111) surface were investigated by means of temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and high-resolution electron energy loss spectroscopy (HREELS). CH(3) fragments were produced by the dissociation of the corresponding iodo-compound. CH(3)I adsorbs molecularly on Mo(2)C at 90 K and dissociates at and above 140 K. The main products of the reaction of adsorbed CH(3) are hydrogen, methane and ethylene. The coupling into ethane was not observed. The results are discussed in relevance to the conversion of methane into benzene on Mo(2)C deposited on ZSM-5.

引用

页码：103 / 107

页数：5

共 26 条

[1] Mimicking aspects of heterogeneous catalysis: Generating, isolating, and reacting proposed surface intermediates on single crystals in vacuum [J].