Electrochemical Reduction Behavior of Carbon Dioxide on Sintered Zinc Oxide Electrode in Aqueous Solution

• IKEDA Shoichiro

  Department of Applied Chemistry, Nagoya Institute of Technology

• HATTORI Atsushi

  Department of Applied Chemistry, Nagoya Institute of Technology

• MAEDA Masunobu

  Department of Applied Chemistry, Nagoya Institute of Technology

• ITO Kaname

  Late Emeritus Professor of Nagoya Institute of Technology

• NODA Hidetomo

  Chubu Electric Power Company, Inc.

抄録

The electrocatalytic properties of a sintered ZnO electrode in electroreduction of CO₂ were investigated in aqueous solutions of several potassium salts. The reduction product from CO₂ was only CO (faradaic efficiency = 70% at −1.4 V vs. Ag-AgCl in 0.1 mol/dm³ KHCO³ solution) with a considerable amount of H₂ as a byproduct. The ZnO was found to have a higher electrocatalytic activity for CO formation than metallic Zn, since the potential showing a maximal faradaic efficiency for CO formation was nobler by 200–250 mV than that of the Zn electrode. The partial current density for CO formation on the ZnO electrode in 0.1 mol/dm³ KH₂PO₄ solution was 10 to 50 times higher than that on a Zn foil electrode. The sum of the faradaic efficiencies for CO and H₂ formation did not reach 100%, the difference from which was attributed to the faradaic efficiency for the reduction of the electrode itself. The metallic Zn thus formed on the electrode surface played no significant role in the electroreduction of CO₂.

収録刊行物

• Electrochemistry

  Electrochemistry 68 (4), 257-261, 2000-04-05

  公益社団法人　電気化学会

キーワード

• Carbon Dioxide
• Zinc Oxide
• Electroreduction
• Potassium Salts

詳細情報

• CRID: 1390564227344659328
• NII論文ID: 10004455245
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.68.257
• ISSN: 21862451
• ISSN: 13443542
• NDL書誌ID: 5358582
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5358582
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/68/4/68_257/_pdf
• 本文言語コード: en
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• 抄録ライセンスフラグ: 使用可