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• W2998996477 abstract "Herein we investigated the effect of the adsorption of Bi and Pb on polycrystalline platinum (Ptp) on the electrooxidation of glycerol (EOG) in alkaline media by combining electrochemical, spectroscopic (in situ FTIR), and analytical (online HPLC) techniques. Besides, we used single crystal Pt electrodes to understand the effect of the modification of Ptp in terms of the atomic arrangements on its surface. We found that the activity of Ptp increases in the presence of Pb (Ptp–Pb), which acts by suppressing the pathways with complete C—C bond breaking (to produce carbonate) and enhancing the production of glycerate, formate, tartronate, and glycolate. We also found that Pt(100) and Pt(111) are affected by the adsorption of both adatoms. However, the modification of Pt(110) explains the results obtained with Ptp. This basal plane is highly activated by Bi and Pb and its behavior is similar to those of Ptp–Bi and Ptp–Pb, respectively. These results permit the conclusion that the adatoms acts mainly by activating Pt atoms with low coordination, which generally binds the adsorbates more strongly and, in consequence, suffers more from poisoning. The adatoms act by preventing the formation of multiple bonded intermediates, likely through a combination of a third body effect and also to a change in the electronic configuration at the surface of the catalyst. We propose in this work that the higher promotion of the EOG by the adatoms in alkaline media is due to a stabilization of the negatively charged intermediates by the Coulombic interaction with the positively charged adatoms." @default.
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• W2998996477 date "2020-01-08" @default.
• W2998996477 modified "2023-10-10" @default.
• W2998996477 title "Pb- and Bi-Modified Pt Electrodes toward Glycerol Electrooxidation in Alkaline Media. Activity, Selectivity, and the Importance of the Pt Atoms Arrangement" @default.
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• W2998996477 doi "https://doi.org/10.1021/acscatal.9b04805" @default.
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