Electrochemical Reduction of CO ₂ to Formate on Nanoparticulated Bi?Sn?Sb Electrodes

Human activities during the last century have increased concentration of greenhouse gases in Earth's atmosphere, mainly carbon dioxide (CO2), and impacts climate change around world are becoming more damaging. Therefore, scientific research is needed to mitigate consequences atmospheric CO2, and, among others, electrochemical CO2 conversion useful chemicals one most interesting alternatives. Herein, different Bi, Sn Sb systems were synthesised as nanoparticles, supported on (Vulcan XC-72R) finally used manufacture electrodes. The Bi?Sn?Sb nanoparticulated their corresponding electrodes characterised by TEM, XPS, ICP-OES SEM. Electrochemical reduction formate was performed an H-type cell a CO2-saturated KHCO3 KCl solution. exhibited good activity selectivity for towards formate. Particularly, Bi95Sb05/C Bi80Sn10Sb10/C showed improved stability compared previous works, keeping values efficiency over 50 % after 24 h.