Capacitance‐Assisted Sustainable Electrochemical Carbon Dioxide Mineralisation

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...

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Bibliographic Details
Published in:ChemSusChem 2018-01, Vol.11 (1), p.137-148
Main Authors: Lamb, Katie J., Dowsett, Mark R., Chatzipanagis, Konstantinos, Scullion, Zhan Wei, Kröger, Roland, Lee, James D., Aguiar, Pedro M., North, Michael, Parkin, Alison
Format: Article
Language:English
Subjects:
aluminium
Aluminum - chemistry
Anodes
Anodizing
Carbon dioxide
Carbon Dioxide - chemistry
Carbon sequestration
Cathodes
co2 capture
Concentrators
Earth crust
Electrochemical Techniques - methods
Electrochemistry
Electrodes
Electrolytes
Graphite
Graphite - chemistry
Hydrogen
Hydrogen-Ion Concentration
iron
Metal scrap
mineralisation
Mineralization
Oxidation
Oxidation-Reduction
Porosity
Seawater
Sodium chloride
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Summary: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. Nothing goes to waste: Low‐energy carbon capture is demonstrated through the innovative design of dual‐material anodes for electro‐capacitive carbonate charging and in situ mineralization using waste metals, sea water, and a solar cell.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.201702087