Publication date: 6th November 2020
In recent years, there has been an increasing interest in alcohol fuel cells for their relatively high reactivity for electrooxidation, their liquid state, and easiness in handling, transport, and storage. Ethanol is abundant, biodegradable, cheap, has a high energy density and can derive from biomass. Nevertheless, the full oxidation to CO2 (12 e- exchange) is difficult and by-products as acetaldehyde and acetic acid are produced. Many publications are focusing on the detection of desorption products at different potentials. However, little attention has been paid to analyze and quantify the products desorbs on the hydrogen evolution reaction region in real-time. This information can provide knowledge about selectivity and conversion and help in the development and understanding of the cyclic voltammetry of ethanol.
In this conference I present the results obtained using SpectroInlet ElectroChemistry – Mass Spectrometry (EC-MS), which is a novel technique consisting of an electrochemical microreactor integrated with a MS, allows for instantaneous product detection with high sensitivities. Thus, EC-MS is a unique tool to analyze the desorbed products. In addition, in-situ ATR-FTIR is being used to analyze the surface absorbed species. The combination of techniques allows the analysis of the reaction mechanisms of ethanol electrooxidation.
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