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The electrochemical reduction of CO2 into chemical products of interest has been considered as an interesting route not only to mitigate climate change but also to store renewable energy in the form of value-added chemicals. Among other possible chemicals, formic acid (HCOOH) or formate (HCOO?) (depending on pH value) is one of the most attractive carbon-based products due to its potential uses and its high world demand including its use as a fuel for low-temperature fuel cells and as a renewable hydrogen carrier molecule. In this contribution, we will summarize our most recent and relevant results on the use of Tin (Sn), Bismuth (Bi), and Antimony (Sb) nanostructured based electrocatalysts for the selective conversion of CO2 into formic acid/ formate. This summary will cover from fundamental studies, including the synthesis, characterization and electrochemical behaviour of these nanostructured materials on conventional H-type electrochemical cells, to practical applications, focused on the development and testing of a process for the electrocatalytic reduction of CO2 to formate (HCOO?) operating in a continuous way, with different electrochemical reactor configurations, such as Gas Diffusion Electrodes (GDE), or Catalyst Coated Membrane Electrodes (CCME), and under different operating conditions. The results obtained will demonstrate the potentialities of this electrochemical technology for the valorisation of CO2 into formic acid/ formate.  

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