The Role of Surface Defects in the Adsorption of Methanol on Fe(3)O(4)(001)

The adsorption of methanol (CH(3)OH) at the Fe(3)O(4)(001)−(√2 × √2)R45° surface was studied using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and temperature-programmed desorption (TPD). CH(3)OH adsorbs exclusively at surface defect sites at room temperature to form hydroxyl gr...

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Detalles Bibliográficos
Autores principales: Gamba, Oscar, Hulva, Jan, Pavelec, Jiri, Bliem, Roland, Schmid, Michael, Diebold, Ulrike, Parkinson, Gareth S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Original Paper
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6979651/
https://www.ncbi.nlm.nih.gov/pubmed/32025174
http://dx.doi.org/10.1007/s11244-016-0713-9
Descripción
Sumario:The adsorption of methanol (CH(3)OH) at the Fe(3)O(4)(001)−(√2 × √2)R45° surface was studied using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and temperature-programmed desorption (TPD). CH(3)OH adsorbs exclusively at surface defect sites at room temperature to form hydroxyl groups and methoxy (CH(3)O) 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.

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