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- W2049425088 abstract "The adsorption, desorption and dissociation of methanol and ethanol on K-dosed Mo2C/Mo(1 0 0) have been investigated by work function, thermal desorption (TPD) and high resolution electron energy loss spectroscopy (HREELS). The adsorption of both molecules at 100 K caused a significant decrease in the work function of the Mo2C/Mo(1 0 0) surface suggesting an electron donation from the O lone pair to carbide surface. Potassium additive stabilized the adsorbed alcohols, and converted a fraction of them to an irreversibly bonded surface species, which decomposed only at higher temperatures, 450–500 K, to yield H2, CO and CH4(CH3OH) and H2, CO, acetaldehyde and ethylene (C2H5OH). From the coincident desorption of major products, H2, CO and K, we inferred the existence of surface compounds between alcohols and potassium on Mo2C/Mo(1 0 0) surface. Analysis of the HREEL spectra of the adsorbed layers suggested that the scission of O–H bond is the primary step in the decompositions of alcohols and we can count with the formation of very stable CH3O–K and C2H5O–K surface species at high potassium coverage. In addition, we can also reckon with the rupture of C–O bonds producing adsorbed CH3 and C2H5 species." @default.
- W2049425088 created "2016-06-24" @default.
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- W2049425088 date "2008-04-01" @default.
- W2049425088 modified "2023-10-17" @default.
- W2049425088 title "Effects of potassium on the adsorption and dissociation pathways of methanol and ethanol on Mo2C/Mo(100)" @default.
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- W2049425088 doi "https://doi.org/10.1016/j.susc.2008.02.010" @default.
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