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The adsorption of methanol (CH3OH) at the Fe3O4(001)-c(2x2) surface wasstudied using X-ray photoelectron spectroscopy (XPS), scanning tunnelingmicroscopy (STM), and temperature-programmed desorption (TPD). CH3OH adsorbsexclusively at surface defects sites at room temperature to form hydroxylgroups and methoxy (CH3O) species. Active sites are identified as step edges,iron adatoms, antiphase domain boundaries in the c(2x2) reconstruction, andabove Fe atoms incorporated in the subsurface. In TPD, recombinative desorptionis observed around 300 K, and a disproportionation reaction to form methanoland formaldehyde occurs at 470 K.

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