Influence of Electrolyte on the Electrochemical Reduction of Carbon Dioxide Using Boron-Doped Diamond Electrodes

Mai Tomisaki, Keisuke Natsui, Norihito Ikemiya, Kazuya Nakata, Yasuaki Einaga

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Electrochemical reduction of CO2 to useful compounds have been actively investigated. The faradaic efficiency and selectivity for products of CO2 reduction depend on some factors, such as electrode materials and electrolytes. Recently, boron-doped diamond (BDD) was found to be a promising electrode material for production of formic acid by CO2 reduction, but the influence of electrolytes has not been sufficiently elucidated. Here, we studied the impact of various cations and anions on CO2 reduction using BDD electrodes. The faradaic efficiency for producing formic acid became higher by using larger alkali metal cations, because these hydrated cations would keep the pH near the cathode suitable for CO2 reduction by their buffer effect. Moreover, formic acid was efficiently obtained by using specifically-adsorbed anions such as halides and sulfate. Finally, we achieved the maximum faradaic efficiency for producing formic acid as high as 95% in RbBr aqueous solution.

Original languageEnglish
Pages (from-to)10209-10213
Number of pages5
JournalChemistrySelect
Volume3
Issue number36
DOIs
Publication statusPublished - 2018 Sep 28

Keywords

  • Boron
  • carbon dioxide
  • diamond
  • electrochemistry
  • electrolyte

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint Dive into the research topics of 'Influence of Electrolyte on the Electrochemical Reduction of Carbon Dioxide Using Boron-Doped Diamond Electrodes'. Together they form a unique fingerprint.

  • Cite this