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 journalArticle

43 Citations (Scopus)

Abstract

Electrochemical reduction of CO 2 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, KHCO 3 , KCl, KHSO 4 ) 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 CO 2 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 CO 2 by a systematic approach.

Original languageEnglish
Pages (from-to)16506-16512
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number29
DOIs
Publication statusPublished - 2014 Oct 2
Externally publishedYes

Fingerprint

Formic acid
formic acid
carbon dioxide
Carbon dioxide
Electrolytes
electrolytes
Electrolysis
Ion exchange
Protons
electrolysis
Membranes
Temperature
Electrodes
Monitoring
membranes
temperature
electrodes
protons
cells

Keywords

  • 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

Cite this

Analysis on the effect of operating conditions on electrochemical conversion of carbon dioxide to formic acid. / Kim, Hak Yoon; Choi, Insoo; Ahn, Sang Hyun; Hwang, Seung Jun; Yoo, Sung Jong; Han, Jonghee; Kim, Jihyun; Park, Hansoo; Jang, Jong Hyun; Kim, Soo Kil.

In: International Journal of Hydrogen Energy, Vol. 39, No. 29, 02.10.2014, p. 16506-16512.

Research output: Contribution to journalArticle

Kim, Hak Yoon ; Choi, Insoo ; Ahn, Sang Hyun ; Hwang, Seung Jun ; Yoo, Sung Jong ; Han, Jonghee ; Kim, Jihyun ; Park, Hansoo ; Jang, Jong Hyun ; Kim, Soo Kil. / Analysis on the effect of operating conditions on electrochemical conversion of carbon dioxide to formic acid. In: International Journal of Hydrogen Energy. 2014 ; Vol. 39, No. 29. pp. 16506-16512.
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AU - Yoo, Sung Jong

AU - Han, Jonghee

AU - Kim, Jihyun

AU - Park, Hansoo

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AB - Electrochemical reduction of CO 2 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, KHCO 3 , KCl, KHSO 4 ) 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 CO 2 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 CO 2 by a systematic approach.

KW - Carbon dioxide

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