Syngas production by electrochemical CO2 reduction in an ionic liquid based-electrolyte

Tiago Pardal, Sofia Messias, Margarida Sousa, Ana S. Reis Machado, Carmen M. Rangel, Daniela Nunes, Joana V. Pinto, Rodrigo Martins, Manuel Nunes da Ponte

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38 Citations (Scopus)


The electrochemical reduction of carbon dioxide dissolved in a solution of water and ionic liquid as electrolyte, at high-pressure and near room-temperature, is reported. This work describes an electro-deposition strategy for the preparation of copper substrate cathodes, coated with bimetallic zinc–copper films, obtained from deep-eutectic solvents plating baths. The prepared bimetallic cathodes showed electrochemical activity for syngas production in 1-butyl-3-methylimidazolium triflate, with yields of 85 NμL (normal microliter) cm−2 C−1/170 NμL cm−2 h−1, high selectivities, tunable H2/CO ratio and low energetic requirements.
Original languageEnglish
Pages (from-to)62-72
Number of pages11
JournalJournal of CO2 Utilization
Publication statusPublished - Mar 2017


  • Carbon dioxide
  • Syngas
  • Electroreduction
  • Ionic liquids
  • Copper–zinc alloys


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