Capacitance-Assisted Sustainable Electrochemical Carbon Dioxide Mineralisation.

Capacitance-Assisted Sustainable Electrochemical Carbon Dioxide Mineralisation.
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DOI:
10.1002/cssc.201702087
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发表时间:
2018-01-10
期刊:
影响因子:
8.4
通讯作者:
Parkin A
Parkin A
中科院分区:
化学2区
文献类型:
--
作者:
Lamb KJ;Dowsett MR;Chatzipanagis K;Scullion ZW;Kröger R;Lee JD;Aguiar PM;North M;Parkin A

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构建了一种电化学电池,该电池包含新型双组分石墨和地壳丰富的金属阳极、产氢阴极和氯化钠水溶液电解质,并用于二氧化碳矿化。在氮气中含有 5% 二氧化碳的气氛下,电池在阳极表现出电容性和氧化性电化学。石墨充当超级电容试剂浓缩器,将二氧化碳以碳酸氢盐的形式泵入水溶液中。阳极金属的同时氧化产生阳离子,其与碳酸氢反应生成矿化二氧化碳。虽然传统的电化学二氧化碳还原需要氢气,但该电池在阴极产生氢气。使用阳极内的废金属、海水作为电解质、工业相关气流和太阳能电池板作为有效的零碳能源,可以以高度可持续的方式实现碳捕获。
An electrochemical cell comprising a novel dual‐component graphite and Earth‐crust abundant metal anode, a hydrogen producing cathode and an aqueous sodium chloride electrolyte was constructed and used for carbon dioxide mineralisation. Under an atmosphere of 5 % carbon dioxide in nitrogen, the cell exhibited both capacitive and oxidative electrochemistry at the anode. The graphite acted as a supercapacitive reagent concentrator, pumping carbon dioxide into aqueous solution as hydrogen carbonate. Simultaneous oxidation of the anodic metal generated cations, which reacted with the hydrogen carbonate to give mineralised carbon dioxide. Whilst conventional electrochemical carbon dioxide reduction requires hydrogen, this cell generates hydrogen at the cathode. Carbon capture can be achieved in a highly sustainable manner using scrap metal within the anode, seawater as the electrolyte, an industrially relevant gas stream and a solar panel as an effective zero‐carbon energy source.
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