Selective high-temperature CO2 electrolysis enabled by oxidized carbon intermediates

  title={Selective high-temperature CO2 electrolysis enabled by oxidized carbon intermediates},
  author={Theis L{\o}ye Skafte and Zixuan Guan and Michael L. Machala and Chirranjeevi Balaji Gopal and Matteo Monti and Lev Martinez and Eugen Stamate and Simone Sanna and Jose A. Garrido Torres and Ethan J. Crumlin and Max Garc{\'i}a-Melchor and Michal Bajdich and William C. Chueh and Christopher R. Graves},
  journal={Nature Energy},
High-temperature CO2 electrolysers offer exceptionally efficient storage of renewable electricity in the form of CO and other chemical fuels, but conventional electrodes catalyse destructive carbon deposition. Ceria catalysts are known carbon inhibitors for fuel cell (oxidation) reactions; however, for more severe electrolysis (reduction) conditions, catalyst design strategies remain unclear. Here we establish the inhibition mechanism on ceria and show selective CO2 to CO conversion well beyond… 
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  • Yi Yu, B. Mao, B. Eichhorn
  • Chemistry, Materials Science
    Physical chemistry chemical physics : PCCP
  • 2014
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It is proposed that enhanced surface reduction at the CGOn/gas two phase boundary in CO/CO2 and in cathodic polarization can explain why the highest reaction rate is obtained for CO2 electrolysis.