The role of surface defects in the adsorption of methanol on Fe3O4(001)

Abstract

The adsorption of methanol (CH3OH) at the Fe3O4(001)-c(2x2) surface was studied using X-ray photoelectron spectroscopy (XPS), scanning tunneling microscopy (STM), and temperature-programmed desorption (TPD). CH3OH adsorbs exclusively at surface defects 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 c(2x2) 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.

7 figures

References in corpus (5)

• Iron Oxide Surfaces
• Subsurface Cation Vacancy Stabilization of the Magnetite (001) Surface
• Ordered Array of Single Adatoms with Remarkable Thermal Stability: Au/Fe3O4(001)
• Ordered Array of Single Au Adatoms with Remarkable Thermal Stability: Au/Fe3O4(001)
• Temperature-Dependence of Magnetically-Active Charge Excitations in Magnetite across the Verwey Transition

Cited by in corpus (6)

• Water Agglomerates on Fe3O4(001)
• A Multi-Technique Study of $C{O}_2$ Adsorption on $F{e}_3$$O_4$ Magnetite
• CO oxidation by Pt2/Fe3O4: metastable dimer and support configurations facilitate lattice oxygen extraction
• Adsorption of CO on the Fe3O4(001) Surface
• Influence of Local Defects on the Dynamics of O-H Bond Breaking and Formation on a Magnetite Surface
• A Multi-Technique Study of C2H4 Adsorption on a Model Single-Atom Rh1 Catalyst