The Role of Surface Defects in the Adsorption of Methanol on Fe3O4(001)

Gamba, Oscar; Hulva, Jan; Pavelec, Jiří; Bliem, Roland; Schmid, Michael; Diebold, Ulrike; Parkinson, Gareth S.

doi:10.1007/s11244-016-0713-9

Record link:

https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:3-2847
http://hdl.handle.net/20.500.12708/337

Title:

The Role of Surface Defects in the Adsorption of Methanol on Fe3O4(001)

Citation:

Gamba, O., Hulva, J., Pavelec, J., Bliem, R., Schmid, M., Diebold, U., & Parkinson, G. S. (2017). The Role of Surface Defects in the Adsorption of Methanol on Fe3O4(001). Topics in Catalysis, 60, 420–430. https://doi.org/10.1007/s11244-016-0713-9

Publisher DOI:

10.1007/s11244-016-0713-9

CatalogPlus:

AC11361246

Publication Type:

Article - Original Research Article

Language:

English

Authors:

Gamba, Oscar
Hulva, Jan
Pavelec, Jiří
Bliem, Roland
Schmid, Michael
Diebold, Ulrike
Parkinson, Gareth S.

Organisational Unit:

E134 - Institut für Angewandte Physik

Journal:

Topics in Catalysis

ISSN:

1022-5528

Date (published):

2017

Number of Pages:

Publisher:

SPRINGER/PLENUM PUBLISHERS

Peer reviewed:

Yes

Keywords:

Oxide surfaces; Surface defects; Methanol; Magnetite; Surface chemistry

Abstract:

The adsorption of methanol (CH3OH) at the Fe3O4(001)−(√2 × √2)R45° surface was studied using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and temperature-programmed desorption (TPD). CH3OH adsorbs exclusively at surface defect sites at room temperature to form hydroxyl groups and methoxy (CH3O) species. Active sites are identified as step edges, iron adatoms, antiphase domain boundaries in the (√2 × √2)R45° reconstruction, and above Fe atoms incorporated in the subsurface. In TPD, recombinative desorption is observed around 300 K, and a disproportionation reaction to form methanol and formaldehyde occurs at 470 K.

License:

CC BY 4.0