Photoelectrochemical oxidation of glycerol on hematite: thermal effects, in situ FTIR and long-term HPLC product analysis
| Autor: | José L. Bott-Neto, Cristian Hessel, Nickson Perini, Elton Sitta, Pablo S. Fernández, Cléo T. G. V. M. T. Pires |
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| Rok vydání: | 2021 |
| Předmět: |
Photoelectrochemical oxidation
Hydrogen Radical chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Redox law.invention chemistry.chemical_compound law Electrochemistry Glycerol General Materials Science Electrical and Electronic Engineering Electrolysis Hematite 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology Selectivity |
| Zdroj: | Journal of Solid State Electrochemistry. 25:1101-1110 |
| ISSN: | 1433-0768 1432-8488 |
| Popis: | Photoelectrochemical (PEC) oxidation of biomass is a profitable approach to produce hydrogen by substituting the water oxidation reaction in the electrolyzers’ photoanodes. Among the biomass-derived molecules, glycerol is an interesting alternative to water since its standard thermodynamic potential is considerably lower than that of water and because it is widely produced in the biodiesel industry. Herein, we performed a fundamental study of the PEC oxidation of glycerol on hematite. In situ FTIR experiments and long-term electrolysis followed by HPLC analysis revealed C1, C2 and C3 oxidation products showing the low selectivity of the reaction under these conditions. We explained this lack of selectivity by an electrooxidation mechanism involving highly reactive radicals as intermediates. |
| Databáze: | OpenAIRE |
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