Can oxygen vacancies in ceria surfaces be measured by O1s photoemission spectroscopy?
Artikel i vetenskaplig tidskrift, 2022

X-ray photoemission spectroscopy is a standard technique for materials characterization and the O 1s binding energy is commonly measured for oxides. Here we use density functional theory calculations to investigate how the O 1s binding energy in CeO2(111) is influenced by the presence of oxygen vacancies. The case with point vacancies in CeO2(111) is compared to complete reduction to Ce2O3. Reduction of CeO2by oxygen vacancies is found to have a minor effect on the O 1s binding energy. The O 1s binding energy is instead clearly changed when the character of the chemical bond for the considered oxygen atom is modified by, for example, the formation of OH-groups or carbonates.

oxygen vacancies

XPS

DFT

ceria

Författare

Noemi Bosio

Chalmers, Fysik, Kemisk fysik

Andreas Schaefer

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Henrik Grönbeck

Chalmers, Fysik, Kemisk fysik

Journal of physics. Condensed matter : an Institute of Physics journal

1361648X (eISSN)

Vol. 34 17 174004

Ämneskategorier

Oorganisk kemi

Materialkemi

Teoretisk kemi

DOI

10.1088/1361-648X/ac4f7b

PubMed

35086084

Mer information

Senast uppdaterat

2022-04-05