Photoelectrochemical oxidation of glycerol on hematite: thermal effects, in situ FTIR and long-term HPLC product analysis

Author(s)

Perini, Nickson ^{[1, 2]} ; Hessel, Cristian ^{[1, 2]} ; Bott-Neto, Jose L. ^{[2, 3]} ; Pires, Cleo T. G. V. M. T. ^{[2, 3]} ; Fernandez, Pablo S. ^{[2, 3]} ; Sitta, Elton ^{[1, 2]}

Affiliation

^[1] Univ Fed Sao Carlos, BR-13565905 Sao Carlos, SP - Brazil

^[2] Ctr Innovat New Energies, BR-13083841 Campinas, SP - Brazil

^[3] Univ Estadual Campinas, BR-13560970 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of Solid State Electrochemistry; v. 25, n. 3, p. 1101-1110, MAR 2021.
• Web of Science Citations: 0

Abstract

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. (AU)

• FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
• Grantee: Ana Flávia Nogueira
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 18/20952-0 - Applied and fundamental studies of the electrochemical conversion of alcohols and CO2
• Grantee: Pablo Sebastián Fernández
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 16/01365-0 - Glycerol electro-oxidation on metallic nanoparticles with interest in basic as well as in applied science. Simultaneous production of energy and fine chemicals
• Grantee: Pablo Sebastián Fernández
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 19/07449-0 - Towards a general understanding of the effect of p-block adatoms on the electrooxidation of polyols on platinum in alkaline media
• Grantee: Pablo Sebastián Fernández
• Support Opportunities: Regular Research Grants