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

作者：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^*

来源：International Journal of Hydrogen Energy, 2014, 39(29): 16506-16512.

DOI：10.1016/j.ijhydene.2014.03.145

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

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.

• 出版日期2014-10-2