(727g) Surface Studies of Functional Alcohol Reactions on Oxygen-Precovered Pt
Our recent studies have found that the presence of oxygen on the Pt(111) surface significantly altered the reactions of furan and furfuryl alcohol in comparison to the clean surface. Furan was found to be active on the oxygen-precovered surface, different than its molecular desorption on clean Pt(111), and incorporated surface O to form H2O, CO, and CO2. HREEL spectra and DFT calculations indicated that furan formed a furanone intermediate via a furyl-type intermediate. For furfuryl alcohol, the same products were formed as on clean Pt(111), but maleic anhydride was also produced as a minor product. HREELS and DFT calculations suggested that oxidation proceeded through dehydrogenation at the alcohol and methylene groups and subsequent oxidation to produce a carboxylate intermediate. The carboxylate intermediate underwent decarboxylation to form CO2 and surface furyl intermediates, which then underwent oxidation to produce furanone and maleic anhydride intermediates.
(1) Williams, R. M.; Pang, S. H.; Medlin, J. W. Ring-Opening and Oxidation Pathways of Furanic Oxygenates on Oxygen-Precovered Pd(111). J. Phys. Chem. C 2014, 118 (111), 27933â27943. https://doi.org/10.1021/jp509284d.
(2) Bhogeswararao, S.; Srinivas, D. Catalytic Conversion of Furfural to Industrial Chemicals over Supported Pt and Pd Catalysts. J. Catal. 2015, 327, 65â77. https://doi.org/10.1016/j.jcat.2015.04.018.