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Role of defects in surface chemistry on Cu2O(111)
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.ORCID iD: 0000-0003-1631-4293
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.ORCID iD: 0000-0002-9663-7705
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2013 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 117, no 38, 19357-19364 p.Article in journal (Refereed) Published
Abstract [en]

High-resolution photoemission spectroscopy and scanning tunneling microscopy (STM) have been used to investigate defects on Cu2O(111) and their interaction with water and sulfur dioxide (SO2). Two types of point defects, i.e., oxygen and copper vacancies, are identified. Copper vacancies are believed to be the most important defects in both water and SO2 surface chemistry. Multiply coordinatively unsaturated oxygen anions (OMCUS) such as oxygen anions adjacent to copper vacancies are believed to be adsorption sites for both water and SO2 reaction products. Water adsorption at 150 K results in both molecular and dissociated water. Molecular water leaves the surface at 180 K. At 300 K and even more at 150 K, SO2 interacts with oxygen sites at the surface forming SO 3 species. However, thermal treatment up to 280 K of Cu 2O(111)/SO2 prepared at 150 K renders only SO4 on the surface.

Place, publisher, year, edition, pages
2013. Vol. 117, no 38, 19357-19364 p.
Keyword [en]
Be adsorption, Co-ordinatively unsaturated, Dissociated waters, High-resolution photoemission spectroscopy, Molecular water, Oxygen anion, Oxygen site, Water adsorption
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-133251DOI: 10.1021/jp3112217ISI: 000330162500012Scopus ID: 2-s2.0-84885032661OAI: oai:DiVA.org:kth-133251DiVA: diva2:660570
Funder
Swedish Research CouncilCarl Tryggers foundation Swedish Foundation for Strategic Research
Note

QC 20140224

Available from: 2013-10-30 Created: 2013-10-29 Last updated: 2017-12-06Bibliographically approved

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Weissenrieder, JonasYu, ShunKarlsson, Ulf O.

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