, Volume 10, Issue 1, pp 29–34 | Cite as

Highly Selective Methane Production Through Electrochemical CO2 reduction by Electrolytically Plated Cu-Co Electrode

  • Yoshiyuki Takatsuji
  • Ikumi Nakata
  • Masayuki Morimoto
  • Tatsuya Sakakura
  • Ryota Yamasaki
  • Tetsuya Haruyama
Original Research


Among the electrode materials used for electrolytic CO2 reduction, only Cu shows a special function of producing not only carbon monoxide (CO), but also hydrocarbons from CO2. We found that, in electrolytic CO2 reduction using an electrolytically plated Cu-Co electrode, a hydrocarbon product with high faradaic efficiency (FE) could be obtained with low-FE CO. The plated electrodes have a Co solid solution on the Cu surface. The non-localized Co changes the adsorption energy of the reaction intermediate in CO2 reduction. Consequently, by increasing the Co content in Cu, HCOOH can be selectively produced. Further, in electrolytic CO2 reduction with an applied potential of − 1.19 V vs. reversible hydrogen electrode (RHE), the selectivity of methane (CH4) production improved, while the selectivity of ethylene (C2H4) formation lowered. In the reduction using the plated electrode containing 14% Co, the FE of CH4 production reached the highest at 47.7%. These results suggested that mixing Co in Cu promotes the hydrogenation of CH2* to CH3* and inhibits the dimerization of CH2* species. Furthermore, this research on plated electrodes is useful for the development of catalytic electrodes for electrolytic CO2 reduction.

Graphical Abstract

Electrolytic CO2 reduction using an electrolytically plated copper-cobalt electrode, a hydrocarbon product with high faradaic efficiency (FE), could be obtained.


CO2 reduction Copper Cobalt Plated electrode Methane production selectivity 


Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Division of Functional Interface Engineering, Department of Biological Functions and EngineeringKyushu Institute of TechnologyKitakyushuJapan
  2. 2.Advanced Catalytic Transformation Program for Carbon Utilization (ACT-C)Japan Science and Technology Agency (JST)TokyoJapan

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