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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Continuous electrochemical reduction of carbon dioxide into formate using a tin cathode: Comparison with lead cathode
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Continuous electrochemical reduction of carbon dioxide into formate using a tin cathode: Comparison with lead cathode

机译：连续的电化学还原的碳二氧化碳为使用锡阴极甲酸:与铅阴极

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摘要

Electrochemical reduction has been pointed out as a promising method for CO2 valorisation into useful chemicals. This paper studies the influence of key variables on the performance of an experimental system for continuous electro-reduction of CO2 to formate, when a tin plate is used as working electrode. Particular emphasis is placed on comparing the performance of Sn and Pb as cathodes. As was previously found with Pb, the influence of current density ("j") using Sn was particularly noteworthy, and when j was raised up to a limit value of 8.5 mA cm~(-2) .important increases of the rate of formate production were observed at the expense of lowering the Faradaic efficiency. However, unlike what was found with Pb, the performance using Sn improved when the electrolyte flow rate/electrode area ratio was increased within the range studied (0.57-2.3 mL min~(-1) cm~(-2)). In this way, the use of Sn as cathode allowed achieving rates of formate production that were 25% higher than the maximum rates obtained with Pb, together with Faradaic efficiencies close to 70%, which were 15 points higher than those with Pb. These results reinforce the interest in Sn as electrode material in the electro-reduction of CO2 to formate.
机译：电化学还原已经指出二氧化碳维持价格转化为一个有前途的方法有用的化学物质。关键变量的性能的影响一个连续的实验系统electro-reduction甲酸的二氧化碳,当锡板作为工作电极。强调比较性能Sn和Pb作为阴极。Pb,电流密度的影响(“j”)使用Sn尤其值得注意,当j长大到马限值8.5厘米~ (2).important甲酸的速度增加生产为代价的降低了感应电流的效率。使用Sn和Pb发现,性能当电解液流量/电极改善研究范围内的面积比增加(0.57 - -2.3毫升min ~(1)厘米~(2))。使用锡阴极允许实现的甲酸生产高于25%最大利率获得Pb,一起感应电流的效率接近70%,15点高于Pb。加强对Sn的兴趣作为电极材料electro-reduction的二氧化碳培训。

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