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Current achievements and the future direction of electrochemical CO2 reduction: A short review
Published in Critical Reviews in Environmental Science and Technology, 2020
Mi-Young Lee, Ki Tae Park, Wonhee Lee, Hyungseob Lim, Youngkook Kwon, Seoktae Kang
One of the most important measures in electrochemical processes is Faradaic efficiency (FE). Apart from current density (j) which is the measure of an overall performance, FEs describe the selectivity of a given system towards a certain product. In electrochemical CO2 reduction, FE becomes especially important because there are 5 different classes of products that tend to form concomitantly in the process – carbon monoxide, organic acids (formic acid and acetic acid), methane, alcohols (methanol, ethanol, and n-propanol), and C2 products (ethylene and ethane). Therefore, studies in the field of electrochemical CO2 reduction have focused primarily on increasing FE and current density (overall performance) toward a selected product.