Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.080
Publication date: 11th July 2022
Nowadays, the search and development of economic and environmentally friendly synthetic procedures, alternative to traditional ones energetically fed by fossil fuels, is essential to avoid not only climate change, but also the inexorable depletion of such energy resource. Within this context, electrocatalysis has emerged as a suitable synthetic methodology that avoids the use of harsh reaction conditions and fossil fuels. Besides, in electrochemical approaches, the application of an electric potential difference allows performing chemical reactions that in normal atmospheric conditions would not take place.
The main chemical procedures studied in electrochemistry are water splitting and CO2 reduction. In both cases, the oxygen evolution reaction (OER) takes place at the anode, providing the electrons and protons needed in the cathode for the generation of H2 in water splitting or the conversion of CO2 into valuable species, such as CH4 or CH3OH. The OER produces O2 that despite being a very important compound, its price in the market is very low, which limits the economic viability of the process and ultimately reduces the interest in this technology.[1] Furthermore, this reaction exhibits large overpotentials when using catalysts based on earth abundant materials, limiting energy conversion efficiency.[2] For these two reasons, there is a growing interest to find alternative reactions to OER at the anode that, by one side, reduce the overpotentials needed and by the other, produce compounds with higher added-value and interest for the chemical industry.[1,3] In this framework biomass valorization, has emerged as an attractive substitute to the oxidation of H2O.[4] Herein we present our studies in the electrochemical oxidation of 5-hydroxymethylfurfural, a species derived from biomass, as an alternative reaction to OER that allows obtaining 2,5-furandicarboxylic acid (FDCA), a useful building block in the pharmaceutical and polymer industry.[5,6]
The authors want to acknowledge the Ministerio de Economía y Competitividad (MINECO) from Spain (ENE2017-85087-C3-1-R and PID2020-116093RB-C41), Fondo Europeo de Desarrollo Regional (FEDER), University Jaume I (UJI-B2019-20) and Generalitat Valenciana (PROMETEO/2020/028) for financial support. D.C. acknowledges Generalitat Valenciana for the GRISOLIAP/2019/057 grant. L.G acknowledges Generalitat Valenciana for the GRISOLIAP/2018/A/070 grant. The authors thank Servicio Central de Instrumentación Científica (SCIC) from Universitat Jaume I for SEM and EDS measurements.
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