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6CCVD Research

Electrochemical reduction of carbon dioxide in an aqueous solution using phosphorus-doped polycrystalline diamond electrodes

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2021-11-24
JournalElectrochemistry Communications
AuthorsHiroshi Naragino, Saitoh Yu, Kensuke Honda
InstitutionsYamaguchi University
Citations13

Abstract

Section titled ā€œAbstractā€

Phosphorus-doped (P-doped) polycrystalline diamond thin films were deposited on a conductive Si substrate by microwave plasma-enhanced chemical vapor deposition (MWCVD), using a liquid source containing phosphorus atoms. The thin films were then used as electrodes for the electrochemical reduction of carbon dioxide (CO2) dissolved in aqueous solution. The P-doped diamond electrode exhibited approximately 1 V higher overpotential for the hydrogen evolution reaction than conventional boron-doped (B-doped) diamond electrodes in an aqueous electrolyte. A cathodic current attributed to the CO2 reduction reaction was observed at the P-doped diamond electrode in 0.2 M Na2SO4 bubbled with CO2. An analysis of the soluble products showed that the main reduction product was formic acid. We have experimentally demonstrated that P-doped diamond thin film is ideal as an electrode material for the electrochemical reduction of CO2 in aqueous solution, as it does not suffer from the interference of hydrogen evolution by water electrolysis.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 1986 - Production of methane and ethylene in electrochemical reduction of carbon dioxide at copper electrode in aqueous hydrogencarbonate solution [Crossref]
  2. 1994 - Electrocatalytic process of CO selectivity in electrochemical reduction of CO2 at metal electrodes in aqueous media [Crossref]
  3. 2017 - CO2 reduction: the quest for electrocatalytic materials [Crossref]
  4. 1997 - Boron-doped diamond thin-film electrodes [Crossref]
  5. 2013 - Enhancement of electrical conductivity and electrochemical activity of hydrogenated amorphous carbon by incorporating boron atoms
  6. 2014 - Control of electric conductivity and electrochemical activity of hydrogenated amorphous carbon by incorporating boron atoms [Crossref]
  7. 2018 - Effect of doping level on the electrochemical reduction of CO2 on boron-doped diamond electrodes [Crossref]
  8. 2018 - Stable and highly efficient electrochemical production of formic acid from carbon dioxide using diamond electrodes [Crossref]
  9. 2020 - Study of carbon dioxide electrochemical reduction in flow cell system using copper modified boron-doped diamond [Crossref]
  10. 2020 - Further study of CO2 electrochemical reduction on palladium modified BDD electrode: Influence of electrolyte [Crossref]

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