Effect of alkali-metal cations on the electrochemical reduction of carbon dioxide to formic acid using boron-doped diamond electrodes. Issue 36 (24th April 2017)

• Record Type: Journal Article
• Authors: Ikemiya, Norihito; Natsui, Keisuke; Nakata, Kazuya; Einaga, Yasuaki
• Is Part Of: RSC advances. Volume 7:Issue 36(2017)
• Page Start: 22510
• Page End: 22514
• Publication Date: 2017-04-24
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra03370b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Rb + cations provide a greater effect on the electrochemical conversion of CO2 to formic acid using BDD electrodes. Abstract : The electrochemical reduction of carbon dioxide in aqueous solutions using boron-doped diamond (BDD) electrodes was investigated at ambient pressure and temperature. We discuss the effects of the alkali-metal (AM) cations, K +, Na +, Rb + and Cs +, on the faradaic efficiency (FE) for the formation of formic acid. An FE of 71% was achieved in the case of a 0.075 M Rb + solution neutralized to pH 6.2 by the addition of HCl. In the case of a Cs + solution neutralized to pH 6.2, the highest FE was obtained with the more dilute concentration of 0.02 M. Of the four different solutions examined, the lowest FE was observed for the Na + solution. Moreover, we found that the productivity for the production of formic acid is higher at higher current densities.