Affordable Access

Access to the full text

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

Authors
  • Takatsuji, Yoshiyuki1
  • Nakata, Ikumi1
  • Morimoto, Masayuki1
  • Sakakura, Tatsuya1
  • Yamasaki, Ryota1
  • Haruyama, Tetsuya1, 2
  • 1 Kyushu Institute of Technology, Division of Functional Interface Engineering, Department of Biological Functions and Engineering, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, 808-0196, Japan , Kitakyushu (Japan)
  • 2 Japan Science and Technology Agency (JST), Advanced Catalytic Transformation Program for Carbon Utilization (ACT-C), Tokyo, 102-0076, Japan , Tokyo (Japan)
Type
Published Article
Journal
Electrocatalysis
Publisher
Springer US
Publication Date
Sep 18, 2018
Volume
10
Issue
1
Pages
29–34
Identifiers
DOI: 10.1007/s12678-018-0492-0
Source
Springer Nature
Keywords
License
Yellow

Abstract

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

Report this publication

Statistics

Seen <100 times