Capacitance-Assisted Sustainable Electrochemical Carbon Dioxide Mineralisation

TY - JOUR

T1 - Capacitance-Assisted Sustainable Electrochemical Carbon Dioxide Mineralisation

AU - Lamb, Katie J.

AU - Dowsett, Mark R.

AU - Chatzipanagis, Konstantinos

AU - Scullion, Zhan Wei

AU - Kröger, Roland

AU - Lee, James D.

AU - Aguiar, Pedro M.

AU - North, Michael

AU - Parkin, Alison

N1 - © 2017 The Authors.

PY - 2018/1/10

Y1 - 2018/1/10

N2 - 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.

AB - 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.

KW - Aluminum/chemistry

KW - Carbon Dioxide/chemistry

KW - Electrochemical Techniques/methods

KW - Electrodes

KW - Graphite/chemistry

KW - Hydrogen-Ion Concentration

KW - Oxidation-Reduction

KW - Porosity

UR - http://www.scopus.com/inward/record.url?scp=85041067109&partnerID=8YFLogxK

U2 - 10.1002/cssc.201702087

DO - 10.1002/cssc.201702087

M3 - Article

AN - SCOPUS:85041067109

SN - 1864-5631

VL - 11

SP - 137

EP - 148

JO - ChemSusChem

JF - ChemSusChem

IS - 1

ER -