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Proceedings Year : 2020

Electrochemical reduction of Co2 on metal oxides


The continuous burning of fossil fuels is leading to an alarming increase of the atmospheric carbon dioxide (CO2) concentration, which has been currently reported to be as high as 414 ppm [1]. Among the different available strategies to address both electricity demands and carbon emissions, the electrochemical reduction of CO2 into value-added products, which is a multistep reaction process involving different pathways [2], is considered as an attractive method that is able to store energy from intermittent renewable sources [3]. Moreover, this approach represents an environmentally friendly way of recycling CO2 as well as its transformation into fuels and chemicals such as carbon monoxide (CO), formic acid (HCOOH), methanol (CH3OH), methane (CH4) and ethylene (C2H4) at mild conditions [4, 5]. However, the main challenge of this technology is associated with the electrocatalytic material used. Thus, the development of highly active, durable, efficient and selective electrocatalysts is still an important issue to be overcome for the industrial implementation of this process [6]. Different metal electrocatalysts such as Au, Ag (CO production) [7], Sn, Pb, Bi, In (HCOOH/HCOO- formation) [8], and Cu (alcohols and hydrocarbons) [9, 10] are well-known selective materials for the electrochemical transformation of CO2. Nevertheless, the efficiency and selectivity of the process still need to be improved. Hence, the use of metal oxides-based electrocatalysts has attracted the interest of the research community due to the possibility of improving catalytic activity, electrode durability and reaction selectivity (regularly represented by the Faradaic efficiency, FE) [2]. The key aspects that lead to an enhanced performance are morphological features (i.e. roughness) and the role of oxygen in reaction mechanisms, among others [11]. Some representative results of CO2 electroreduction at metal oxides electrocatalysts are presented in Table 1 [12-14].
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hal-04021009 , version 1 (09-03-2023)


  • HAL Id : hal-04021009 , version 1


Ivan Merino-Garcia, J. Albo, Carlos M Sánchez-Sánchez. Electrochemical reduction of Co2 on metal oxides. 4p., 2020, XL Meeting on the Electrochemistry Group of Spanish Royal Society of Chemistry. ⟨hal-04021009⟩
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