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Journal of electroanalytical chemistry v.785, 2017년, pp.138 - 143   SCI SCIE
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High efficiency graphene/Cu2O electrode for the electrochemical reduction of carbon dioxide to ethanol

Geioushy, R.A. (Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia ); Khaled, Mazen M. (Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia ); Hakeem, Abbas S. (Center of Excellence in Nanotechnology, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia ); Alhooshani, Khalid (Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia ); Basheer, Chanbasha (Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia );
  • 초록  

    Abstract Fabrication of an efficient catalyst for the electrochemical reduction of CO 2 to valuable products at low overpotential remains a severe challenge. Herein, graphene (GN)/Cu 2 O catalyst, with an average particle size of 20–50nm has been synthesized and coated on copper foil. The linear seep voltammetry studies showed that the 0.1mg of GN/Cu 2 O loaded catalyst exhibited the highest current density in CO 2 saturated 0.5M NaHCO 3 electrolyte. The GN/Cu 2 O electrode was significantly more active towards CO 2 reduction showing a current density of approximately 12.2mA/cm 2 at −1.7V versus Ag/AgCl, which is higher than Cu 2 O electrode (8.4mA/cm 2 ). Gas chromatography-mass spectrometry analysis of the liquid products revealed that ethanol (~0.34ppm) was found to be the predominant product at −0.9V with high reasonably Faradaic efficiency up to 9.93%. These results suggest that graphene may be used as a promising non-metallic support for the electrochemical reduction of CO 2 . Highlights Graphene/Cu 2 O electrode was fabricated for the electrochemical reduction of CO 2 . Very low material loading of graphene/Cu 2 O (0.1mg) resulted in significant conversion of CO 2 to ethanol. The Faradaic efficiency for ethanol was 9.93% at −0.9V vs. Ag/AgCl. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Graphene/Cu2O .   CO2 .   Electrochemical reduction .   Ethanol.  

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