Ozone-Induced Band Bending on Metal-Oxide Surfaces Studied under Environmental Conditions

• Published in: Chemphyschem 2013-08, Vol.14 (11), p.2419-2425
• Main Authors: Lampimäki, Markus, Zelenay, Veronika, Křepelová, Adéla, Liu, Zhi, Chang, Rui, Bluhm, Hendrik, Ammann, Markus
• Format: Article
• Language: English
• Subjects: Adsorption; band bending; Chemistry; Decomposition; Exact sciences and technology; General and physical chemistry; metal oxides; ozone; surface chemistry; Surface physical chemistry; x-ray photoelectron spectroscopy
• ISSN: 1439-4235; 1439-7641
• DOI: 10.1002/cphc.201300418

Ozone adsorption and decomposition on metal oxides is of wide interest in technology and in atmospheric chemistry. Here, ozone‐adsorption‐induced band bending is observed on Ti‐ and Fe‐oxide model surfaces under dry and humid conditions. Photoelectron spectroscopic studies indicate the effect of charge transfer to O3, which limits the surface coverage of the precursor to decomposition reactions. This is also consistent with the negative pressure dependence observed in previous studies. These results contribute to our fundamental understanding of ozone adsorption and decomposition mechanisms on metal oxides of environmental and technological relevance. Bind until you bend: Ozone‐adsorption‐induced band bending is observed on Ti‐ and Fe‐oxide surfaces under dry and humid conditions. X‐ray photoelectron spectroscopy results indicate that O3 adsorption and decomposition proceed via a mechanism including a reversibly adsorbed precursor. These results contribute to the fundamental understanding of O3 adsorption and decomposition mechanisms on oxides of environmental and technological relevance.