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首页> 外文期刊>International Journal of Electrochemical Science >Insight into Improving Energy Efficiency of Electrochemical CO2?Reduction to Formate in Divided H-type Cell
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Insight into Improving Energy Efficiency of Electrochemical CO2?Reduction to Formate in Divided H-type Cell

机译：洞察改善电化学二氧化碳的能效效果？在分开的H型细胞中减少甲酸

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The conversion of carbon dioxide (CO2) into formate by the intermittent generation of renewable energy is of great interest for many applications. Most studies have so far focused on how to improve the faradaic efficiency but ignored the importance of energy efficiency. In this study, the electrochemical reduction of CO2 (ERC) was carried out in a divided H-type electrolyzer. The improvement of energy efficiency was studied in the context of three aspects: (1) contrasting the cathodic catalysts, i.e., traditional Sn foil with highly active nano-Bi (produced in situ by reduction from nano-Bi2O3), (2) comparing anodic catalysts, i.e., traditional Pt plate and the as-prepared Ir/C, and (3) contrasting anodic electrolytes, i.e., aqueous solutions of KHCO3 and KOH. The energy efficiency of the ERC to formate can reach 38.2% with the r-Bi2O3 cathodic catalyst, and Ir/C anodic catalyst were used in 1.0 M KOH anolyte, at a low cell potential (2.06 V). This work concluded that KOH anolyte is more suitable for the ERC to formate. Furthermore, the method of calculating the energy efficiency for the ERC to formate was also systematically reviewed.
机译：通过间歇生成可再生能量的间歇生成二氧化碳（CO2）将二氧化碳（CO2）转化为甲酸盐对许多应用具有很大的兴趣。到目前为止，大多数研究都集中在如何提高法拉迪效率，而忽略了能源效率的重要性。在该研究中，CO 2（ERC）的电化学还原在分开的H型电解槽中进行。在三个方面的背景下研究了能效的提高：（1）将阴极催化剂对比具有高活性纳米BI的传统Sn箔（通过从纳米Bi2O3的降低原位生产），（2）比较阳极催化剂，即传统的Pt板和制备的IR / C，以及（3）对比阳极电解质，即KHCO 3和KOH的水溶液。通过R-Bi2O3阴极催化剂，ERC甲酸的能量效率可达到38.2％，并且在低电池电位（2.06V）下使用IR / C阳极催化剂。这项工作得出结论，Koh Anolyte更适合于ERC甲酸。此外，还系统地综述了计算ERC以形成的能量效率的方法。

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