Adsorption and Desorption of CO on W(110) Surfaces

Bulletin of the Korean chemical society

Hae-geun Jee¹  Soon-Bo Lee¹  Gyung Hee Lee¹  Jin-Hyo Boo¹  Young Dok Kim¹  Hyun Seok Han¹  Taek-seung Yang¹ 

关键词: Tungsten;    CO;    Chemisorption;    Photoelectron spectroscopy;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The adsorption of CO on W(110) surfaces was studied using thermal desorption spectroscopy (TDS), and core and valence level spectroscopy. At 120 K, CO forms a tilted structure at lower coverages (�?₁), whereas it adsorbs normal to the surface at higher coverages (�?₂). Tilted structures have been suggested to be precursors of dissociative chemisorption; however, experimental evidence is provided for the non-dissociative chemisorption of CO at temperatures above 900 K (which is referred to as the �?-state): TDS shows first order desorption kinetics. The core and valence level spectra of O/W(110) and those of �?-CO/W(110) are different. Most importantly, the 4�? molecular orbital of CO can be identified in the valence level spectra of the �?-CO.

【 授权许可】

Unknown