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首页> 外文期刊>RSC Advances >Effect of alkali-metal cations on the electrochemical reduction of carbon dioxide to formic acid using boron-doped diamond electrodes
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Effect of alkali-metal cations on the electrochemical reduction of carbon dioxide to formic acid using boron-doped diamond electrodes

机译：碱金属阳离子对掺硼金刚石电极将二氧化碳电化学还原成甲酸的影响

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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.
机译：在环境压力和温度下，研究了使用掺硼金刚石（BDD）电极电化学还原水溶液中二氧化碳的方法。我们讨论了碱金属（AM）阳离子，K + ，Na + ，Rb < small> + 和Cs + ，关于形成甲酸的法拉第效率（FE）。通过添加HCl将0.075 M Rb + 溶液中和至pH 6.2时，FE达到71％。在将Cs + 溶液中和至pH 6.2的情况下，FE最高，而稀释浓度为0.02M。在所检查的四种不同溶液中，最低在Na + 溶液中观察到FE。此外，我们发现在较高电流密度下生产甲酸的生产率更高。

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