CO2 chemisorption on alkalated TiO2(100)-(1×3) studied with MIES and UPS(HeI)

Autor:	V. Kempter, M. Brause
Rok vydání:	2001
Předmět:	Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Alkali metal Oxygen Electron spectroscopy Surfaces Coatings and Films X-ray photoelectron spectroscopy chemistry Chemisorption Caesium Metastability Materials Chemistry Work function
Zdroj:	Surface Science. 476:78-84
ISSN:	0039-6028
DOI:	10.1016/s0039-6028(00)01118-3
Popis:	The CO 2 uptake of clean and partially alkalated (K,Cs) TiO 2 (1 0 0)-(1×3) surfaces was studied under in situ control of metastable impact electron spectroscopy (MIES) and photoelectron spectroscopy (UPS(HeI)) at room temperature. While the clean surface shows no uptake of CO 2 , it is quite strong for the alkalated surface at room temperature. The work function increase observed during the CO 2 uptake signals charge flow from the alkali adsorbates into the lowest unoccupied 2π u MO of CO 2 . It is suggested that the resulting CO 2 − intermediate bonds to surface oxygen forming a carbonate (CO 3 ) complex. The results are compatible with the assumption that CO 2 chemisorbs close to those oxygen anions that have alkali atoms associated with themselves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8afb0b37af33d592d10f2c8a4dacbe50 https://doi.org/10.1016/s0039-6028(00)01118-3 Zobrazit plný text záznamu Full Text from ScienceDirect