Analysis on the effect of operating conditions on electrochemical conversion of carbon dioxide to formic acid

Hak Yoon Kim, Insoo Choi, Sang Hyun Ahn, Seung Jun Hwang, Sung Jong Yoo, Jonghee Han, Jihyun Kim, Hansoo Park, Jong Hyun Jang, Soo Kil Kim

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)


Electrochemical reduction of CO2 to HCOOH was performed on a Sn electrode using a proton exchange membrane-embedded electrolysis cell. The effects of reaction conditions such as catholyte and anolyte types, reduction potential, catholyte pH, and reaction temperature on the amount of HCOOH and its faradaic efficiency were investigated. Four different electrolytes (KOH, KHCO3, KCl, KHSO4) were chosen as the candidate catholyte and anolyte; the most suitable electrolyte was chosen by monitoring the amount of HCOOH and faradaic efficiency. The effect of the pH of the selected catholyte on the conversion of CO2 to HCOOH was also investigated. In addition, the reaction temperature was varied and its effect was studied. From the observations made, we determined the optimal reaction conditions for the production of HCOOH via the electrochemical reduction of CO2 by a systematic approach.

Original languageEnglish
Pages (from-to)16506-16512
Number of pages7
JournalInternational Journal of Hydrogen Energy
Issue number29
Publication statusPublished - 2014 Oct 2

Bibliographical note

Funding Information:
This research was supported by a grant from the Korea CCS R&D Center (KCRC) funded by the Korea government ( Ministry of Science, ICT & Future Planning ) ( NRF-2013M1A8A1056298 ).

Publisher Copyright:
© 2014 Hydrogen Energy Publications, LLC.


  • Carbon dioxide
  • Electrochemical conversion
  • Formic acid
  • Sn electrode

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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